Question

Rewrite sin80° in terms of the appropriate cofunction.

Answer 1

Given the expression:

sin80°

Let's rewrite the given expression in terms of apropriate cofunction.

To rewrite, apply the formula:

`\sin x=\cos (90-x)`

Hence, we have:

`\begin{gathered} \sin 80=\cos (90-80) \\ \\ \sin 80=\cos 10^o \end{gathered}`

Therefore, sin80° in terms of the appropraite cofunction is cos(10)°.

ANSWER:

cos10°