Zhihu, a high-quality Q&A community on the Chinese Internet and an original content platform where creators gather, was officially launched in January 2011 with the brand mission of "allowing people to better share knowledge, experience and insights, and find their own answers." Zhihu relies on seriousness and professionalism. Why do many people often put tg://settings in their description and generally just send them to the chat, what it is and why. In mathematics, sin, cos, tg, and ctg represent respectively; sina= (opposite side of ∠a)/ (hypotenuse of ∠a), cosa= (adjacent side of ∠a)/ (hypotenuse of ∠a). One is tan, and the other is tg. We often use tan now, tg means tangent function, and ctg means cotangent function.
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