Question

if sin 20 = 1 then cos theta ?​

Answer 1

Answer:

sin is in which theta??????????

Answer 2

Answer :

=> sin 2Θ = 1

=> 2Θ = 90

=> Θ = 90/2

=> Θ = 45°

=> cos Θ = cos45° = $\frac{1}{ \sqrt{2} }$