(cos(6x))^2=______+_______ cos(_______x)

I charge to ample in these blanks....??

Answers :Ok. Use this bisected bend identity: 2(cos(θ))^2 = -1 + cos(2θ)
Divide the absolute blueprint by 1/2 to get rid of the two preceding, and again acting in "6x" area you see θ (Greek letter theta).

You should appear up with:
(cos(6x))^2 = -1/2 + 1/2cos(12x)

Good luck!

A adolescent holds a bonbon bar 17.5 cm in foreground of the arched side-view mirror of an automobile. The angel acme is bargain by one-half. What is the ambit of curvature of the mirror?
cm