Question

(cos Θ − cos Θ)^2 + (cos Θ + cos Θ)^2

Answer 1

i am pretty sure it is sin^2

Answer 2

bu ti just need another opinion

Answer 3

?

Answer 4

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

Answer 5

no, you just put that one..... and i said "?"

Answer 6

\[(\cos \theta+\cos \theta)^2=\cos ^2\theta+2\cos ^2\theta+\cos ^2\theta=4\cos ^2 \theta\]

Answer 7

so what type of cos equations would equal sin?

Answer 8

and he is gone... ignore that last question...

Answer 9

wish i i knew how to give medals...

Answer 10

yes (2cos theta)^2 = 4 cos ^2 theta

Answer 11

we have the Pythagorean identity cos^2 + sin ^2 =1
where cos^2 theta =1- sin^ theta