Question

Solve for x: i cos^2 x +cos^2 30^o = 1 ii cos( 2x - 30^o) = 0​

Answer 1

Answer:

cos(2x−30o)=cos90o⇒(2x−30o)=90o⇒2x=120o⇒x=60o

Answer 2

Solve for x: i cos^2 x +cos^2 30^o = 1 ii cos( 2x - 30^o) = 0

Hence 60° is ypur answer