Question

Using the identity sine + cos²0 = 1, find the value of tan 8, to the nearest hundredth, if cos 0 is -0.7 and 8 is in Quadrant II.​

Answer 1

-1.01

Explanation:

cos^2 + sin^2 = 1

0.49 + sin^2 = 1

sin^2 = 0.51

sin = 0.71

tan = sin/cos = 0.71/-0.7 = -1.01