Question

HELP ME PLEASE (cos Θ + cos Θ)2 + (cos Θ + cos Θ)2

Answer 1

sin2 Θ
4
8cos2Θ
cos2 Θ

Answer 2

what your answer and use a calculator

Answer 3

i don't know how to do it

Answer 4

explain how and then i can figure it out

Answer 5

cos Θ + cos Θ +2 + cos Θ + cos +2

Answer 6

Is it like this \((cos\,\theta+cos\,\theta)^2+(cos\,\theta+cos\,\theta)^2\) ?

Answer 7

yes exactly

Answer 8

and i posted the answers above , can you help me out @Sachintha

Answer 9

i dont know it was square of what in the bracket

Answer 10

you're not making sense if you don't know how to do it, don't confuse yourself. ill find someone else who knows it

Answer 11

hint:
\[\left( {\cos \theta + \cos \theta } \right) = {\left( {2\cos \theta } \right)^2} = 4{\left( {\cos \theta } \right)^2}\]

Answer 12

oops..
I have made a typo:
\[{\left( {\cos \theta + \cos \theta } \right)^2} = {\left( {2\cos \theta } \right)^2} = 4{\left( {\cos \theta } \right)^2}\]

Answer 13

hope you think 4cos^2 theta - yes ?

Answer 14

yes!

Answer 15

yes i was just writing that :)

Answer 16

just bc. in these above wrote choices are wrote in this way - sorry for ...

Answer 17

What answer would be correct them, B?

Answer 18

I think it is option C, since the function is:
\[f\left( \theta \right) = {\left( {\cos \theta + \cos \theta } \right)^2} + {\left( {\cos \theta + \cos \theta } \right)^2}\]

Answer 19

Okay thank you again :)

Answer 20

:)

Answer 21

Can you help me with ne more