Question

Give the exact value of the expression without using a calculator:
sin(2cos(inv) 1/5)

Answer 1

idk

Answer 2

let cos(inv) 1/5 = A

Answer 3

\[\sin (2A)= 2sinAcosA\]

Answer 4

what is A you substitute

Answer 5

\[2\sin (\cos ^{-1}1/5) \cos (\cos ^{-1}1/5)\]

Answer 6

\[2\sin (\cos ^{-1}1/5) * 1/5\]

Answer 7

can you go on from here