Question

2cos3 theta =1

then solve for theta ...​

Answer 1

Explanation:

hey mate refer to the attachment

Answer 2

$= > 2 \cos(3theta) = 1 \\ = >2 \cos(3theta) = 2 \times \frac{ 1}{2} \\ = > 2 \cos(3theta) = 2 \cos(45) \\ = > \cos(3theta) = \cos(45) \\ = > 3theta = 45 \\ = > theta = 15$