Question

What is a possible value of sin θ when cos2θ = 0.73?

Answer 1

(−18)2+cos2θcos2θcos2θcosθcosθ=1=1−164=6364=±37‾√8=−37‾√8

secθ=−837‾√=−87‾√21,tanθ=137‾√=7‾√21, and cotθ=37‾√

Answer 2

A possible value of sin would be 0.73