Question

HELP WILL GIVE BRAINLIEST FOR ANSWER QUICKLY PLEASE HELP

Answer 1

Answer:

We have sinθ = 12/13

The  method here is to figure out the value of θ

Using a calculator sin^(-1)(12/13) =67.38°

67.38° is in quadrant 1  so we must substract 67.38° from 180° wich is π

• 180-67.38= 112.61° ⇒ θ= 112.61°

Now time to calculate cos2θ and cosθ using a calculator

• cosθ = -5/13
• cos2θ =  -0.7

The values we got make sense since θ is in quadrant 2 and 2θ in quadrant 3