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gaarafly1
@gaarafly1
August 2022
1
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как искать sinx cosx если известен tgx или ctgx ?
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yellok
1+tg²x=1/cos²x ⇒ cosx=√1/(1+tg²x)
1+ctg²x=1/sin²x ⇒ sinx=√1/(1+ctg²x)
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Answers & Comments
1+ctg²x=1/sin²x ⇒ sinx=√1/(1+ctg²x)