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Asked by Pilly

Which is the correct cofunction identity for tan?

12 years ago

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Answered by Steve
cot(pi/2-x) = tan(x)

that what you mean?

In fact, for any trig function f, co-f(x) = f(pi/2-x). The "co" means complementary angle.
12 years ago
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Which is the correct cofunction identity for tan?

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