what is tan sin/cos

One day, while feeding fish, Yvette accidentally fell into the pond and discovered a life-shattering truth: She had no blood relation with her parents or her five brothers. She was nothing but the Stewart family's false heiress! Faced with the certainty of losing everything, Yvette decided to stop struggling altogether and just enjoy life before being kicked out. But when Harriet, the true heiress, finally returned, her brothers shielded Yvette behind them, pleading, "Harriet, let her stay.She's... not exactly sharp. It's too dangerous for her out there aloneOne day, while feeding fish, Yvette accidentally fell into the pond and discovered a life-shattering truth: She had no blood relation with her parents or her five brothers. She was nothing but the Stewart family's false heiress! Faced with the certainty of losing everything,Yvette decided to stop struggling altogether and just enjoy life before being kicked out. But when Harriet, the true heiress, finally returned, her brothers shielded Yvette behind them, pleading,"Harriet,let her stay.She's... not exactly sharp. It's too dangerous for her out there alone."

When I turn 20, my grandfather's old friend—now the richest man in the country—lays out photos of his grandsons in front of me. He says, "Pick one to be your husband." Without hesitation, I choose Nathaniel Chapman. Everyone in the room is stunned. After all, it's no secret I've always been hopelessly in love with George Chapman. I used to swear I'd marry no one but him. In my previous life, I got what I wanted—I married George. And because of that marriage, he inherited the lion's share of his grandfather's wealth. But after the wedding, he started an affair with my sister. My parents were furious and sent her abroad to study. George thought I was the one who exposed them. From then on, he hated me to my very core. Women came and went at his side, each one resembling my sister more than the last. The betrayal crushed me. I fell into deep depression. Later, he secretly replaced my medication with slow-acting poison. I died with a child in my womb—alone, bitter, and betrayed. Now, I've been reborn. This time, I choose to let them have each other. But what I don't expect is that George has been reborn too.

Lynn, a girl born in a remote mountainous region, worked diligently to gain admission to a prestigious university. However, her father, who favored sons over daughters, refused to support her aspirations and even went so far as to tear up her acceptance letter. In contrast, her mother sold her blood to help fund Lynn's education. Five years later, Lynn achieved remarkable success and envisioned building factories in her hometown to uplift all the villagers. However, the villagers mistakenly perceived her as a foot massage worker. In reality, she was the CEO of Honor Group.

Since childhood, Melanie Llyod has lived under the shadow of loss, her mother gone and her stepmother intent on securing a vast inheritance. Raised in a world of fragile comfort, Melanie grows weak and dependent. But after a sudden accident, Ashton Llyod reappears in her life, urging her to find strength and independence. The emotions they've suppressed for years begin to surface. Though they share no blood, they've lived as siblings for 18 years. But in the 19th year, everything changes… Kate Llyod, determined to steal Melanie's fiance, relentlessly tries to expose the secret connection between Melanie and Ashton. Amidst the growing misunderstandings, Melanie decides to bury her feelings and honor her engagement. Ashton, too, chooses to distance himself, focusing on his responsibilities. But when a twist of fate leads to a murder attempt, Ashton is left gravely injured and hospitalized. At last, both must confront their true feelings for each other. Yet, the challenges ahead are far from over…

A zombie, who still retains human consciousness, adopts Ivy Hull, a former empress who's gotten reincarnated as a baby, when the blood moon is over. They keep each other company in their apartment located on the ninth floor. While the zombie dad controls zombie hordes and keeps evolving by devouring cores, Ivy practices the Glazed Breath Method and time control to become stronger so that she can protect her dad. Together, they strive to survive till the end of the apocalypse.

Efa was the daughter of a murderer. Her mom loved the wrong man, ruined a family, and ended up in prison. After she died, Efa met her father and three half-brothers, but they wanted nothing to do with her. Then Efa became a national sweetheart overnight. As the world fell for her, her childhood friend Declan took her hand.Let's build our own home.She turned to leave—but the men who once pushed her away suddenly wouldn't let her go.

Six years ago, Fred Steel, once the president of the World Neurology Association, walked away from invitations from the world’s top medical circles to live incognito in River City. His only mission: to ensure the awakening of one man—a man whose salvation he regarded as the crowning achievement of his life. That man is Felix Quaid, CEO of Peak Group, who has remained unconscious in a top-tier medical ward for six years. Now, the very man who reshaped the world six years ago is about to wake, and his return will once again send tremors across the globe.

Larry had been bullied and ignored by everyone in his class for being poor since childhood. However, years later, he grabbed the chance and founded Peak Garment Factory. It soon became one of the top enterprises in the local county, and Larry became the most successful one among all his classmates.Starting from winning over his first love, Quincy, Larry started his revenge...

Melissa Zeller and Travis Shaw have a ten-year age difference. Three years into their marriage, just as Melissa is ready to have babies, she discovers that Travis truly loves Sophie Lane and has only ever treated her as a replacement.Heartbroken, she decides to divorce him. On the day she receives the divorce certificate, Travis learns that Sophie is being forced into a marriage and rushes to save her, only to discover that Melissa is also at the wedding...

Jason Hawks is unexpectedly reborn as a flea. Relying on his hardened mouthparts to suck blood, he continuously evolves, as intricate patterns gradually emerge across his body—eventually destined to grow wings and soar through the skies. With an overwhelming will to survive, he is cunning and ruthless, constantly devising unexpected tricks in the face of adversity. Meanwhile, Chione Lawson, a cold and stunning young woman from the Void Academy, appears outwardly aloof but is strong-willed, vengeful, and deeply perceptive. By a twist of fate, she becomes the key figure entangled in his destiny.

A zombie, who still retains human consciousness, adopts Ivy Hull, a former empress who's gotten reincarnated as a baby, when the blood moon is over. They keep each other company in their apartment located on the ninth floor. While the zombie dad controls zombie hordes and keeps evolving by devouring cores, Ivy practices the Glazed Breath Method and time control to become stronger so that she can protect her dad. Together, they strive to survive till the end of the apocalypse.

Efa was the daughter of a murderer. Her mom loved the wrong man, ruined a family, and ended up in prison. After she died, Efa met her father and three half-brothers, but they wanted nothing to do with her. Then Efa became a national sweetheart overnight. As the world fell for her, her childhood friend Declan took her hand.Let's build our own home.She turned to leave—but the men who once pushed her away suddenly wouldn't let her go.

Plagued by an embarrassing condition, Bille seeks an intimate checkup from her cousin Vincent, the college physician—only to awaken a forbidden desire. Soon discovering they share no blood ties, she tries to close the distance between them. As much as Vincent resists, his hidden longing strains control, pushing their charged connection toward rupture and reckoning.

A delivery guy Haven Ware dies in an accident and wakes up in a strange fantasy world where men are nearly infertile and women wield supernatural powers. Sold into slavery to twin sisters for a hundred copper coins, he discovers their true plan: to have him father a child in place of an aging, barren nobleman. This bizarre mission activates a mysterious "fertility system" that rewards him with power and skills the more affection he earns from the girls.

Madelyn, leader of the world's top assassin organization Vermilion Order, discovers she's the long-lost daughter of Southhaven's powerful Randall family. She returns home pretending to be a poor girl from the slums, hiding her true identity. While her family showers her with love, her Uncle Louie plots to seize power, teaming up with the mafia to expose her past. Meanwhile, old enemies from the Darkscale Union seek revenge.Madelyn joins forces with her once-hostile stepsister Britney and reconnects with Jeffrey Hudson—secretly the head of the Duskthorn Order. With her strength and her family's support, Madelyn defeats the threats and secures her place in both the family and the underworld.

This is a Titan Era where Flynn Lester has transmigrated. In this world, underground caverns have opened, and demonic beasts invade reality, causing massive human casualties. In this time of crisis, humans can awaken Titans to resist the beasts.However,at his awakening moment, Flynn awakened the Tower of Ten Beasts,which contains ten god-tier primordial beasts. Watch as Flynn dominates the Titan Era!

At his brother's engagement banquet, elite tycoon Larry Nell stunned society by marrying an outsider, Coral Baker, a whirlwind union fueled by rumors of a scandalous public kiss. In truth, she was just a paid stand-in, hired to play the dutiful ""Mrs. Nell"" amid his mercurial whims.What began as a transaction, his need for a decoy, her need for cash, slowly defied the contract. Amendments piled up, each edit eroding the cold terms with unspoken desire.By the end, no one remembered the pretense. Only the love story remained.

Hailed as the Federation's greatest mecha master, Dylan was betrayed by his disciple Loki at the Demon Abyss. To prevent the Ark Core from falling into enemy hands, he chose to self-destruct and sacrifice himself. However, Dylan did not truly die. Reborn in the body of a child named Howard, he carried the Ark Core within him, while two bonded mechas lay dormant in his soul. In this world now overrun by demons, Howard, armed with the memories of his past glory and betrayal, vows to exact vengeance and is determined to protect his newfound family…