Question

(Cos theta - Cos theta) ^2 + (Cos theta + Cos theta) ^2

Answer 1

Hi dr, Gud mrng. .....

=(0)^2+(2cos theta)^2
=4cos^2 theta

HOPE THIS HELPS...

Answer 2

Answer:

4 + 4  sin^2 theta

Step-by-step explanation:

= (0)^2 + (2 cos theta) ^2

= 0 + 4 cos^2 theta                         as  (cos theta)^2 = cos^2 theta

= 4  (1 + sin^2 theta )                       as  cos^2 theta = 1+ sin^2 theta

= 4 + 4 sin^2 theta