Question

Using the identity sin? 0 + cos2 0 = 1, find the value of sin 0, to the nearesthundredth, if cos 0 = -0.42 and 1

Answer 1

The identity sen² θ + cos ² θ = 1. isolate the sen θ = √(1- cos²θ)

replace values sen θ = √(1- (-0,42) ²) = 1.08. The nearest hundredth is 1,1.