Question

if cos^2 A - sin ^2A =1/2, find the value of tan ^2 =A​

Answer 1

Step-by-step explanation:

cos^2 A -(1-cos^2A) sin^A=1-cos^A

2cos^2-1=1/2

2cos^A=3/2

cosA= √3/4

cosA=cos30°. √3/2=cos30°

A=30°

tan30°^2=1/3