Question

If cos 2 theta is equals to sin 4 theta,where 2 theta and 4 theta are acute angles,find the value of theta.

Answer 1

theta = 15
bcoz put cos 2theta = sin 4theta
cos 2theta = cos (90-4theta)
2theta =90 -4thetA
6theta =90
theta = 15 degree

Answer 2

Answer:

Cos2 theta=Sin4 theta

Sin(90-2)=Sin4 theta

Comparing angles

(90-2)=4 theta

90=4+2 theta

90=6 theta

theta=90/6

theta=15

Step-by-step explanation: