Question

o^_^o ello!
trig trig trig trig

Rewrite as an equivalent expression that does not contain powers of trig functions greater than 1.

\[\huge\rm 8 \cos^2 x\]

Answer 1

you mean to tell me you dont know how to do this

Answer 2

You was teaching me conics

Answer 3

;-;

Answer 4

2 cos² θ = cos 2θ + 1

Answer 5

cos 2θ = cos² θ - sin² θ

Answer 6

cos^2 theta = 1- 2 sin^2 theta

Answer 7

okay so answer is 4+4cos2x
but how ???

Answer 8

:)

Answer 9

\[8\cos^2x = 4\cdot 2\cos^2x = 4\cdot (1+\cos (2x)) = 4+4\cos (2x)\]

Answer 10

@rational

Answer 11

I didn't want to give a sort of direct answer

Answer 12

ohhh
\[\huge\rm cos (2x) = 2 \cos^2 x -1\]
solve for 2cos^2
\[\rm cos (2x) +1 = 2\cos^2\]
hmmm
that's how
2cos^2 = cos (2x) +1

Answer 13

yup :)

Answer 14

\(\color{blue}{\text{Originally Posted by}}\) @DaWizjr
I didn't want to give a sort of direct answer
\(\color{blue}{\text{End of Quote}}\)
\(\color{blue}{\text{Originally Posted by}}\) @Nnesha
okay so answer is 4+4cos2x
but how ???
\(\color{blue}{\text{End of Quote}}\)
:D i already know the answer :-)

Answer 15

thanks!!! rational & Dawizjr!!!

Answer 16

@Nnesha mujhay math nahi ati :(