- #1

i_m_mimi

- 17

- 0

Answer: 2.97

Attempts:

1-cos^2(x) = 3 – x

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

Factored it and got x = pi = 3.14

It’s a multiple choice question, and other answers were 3.02,3.09 which are few decimal places off so the answer must not be pi since it's not even a choice. Is the answer key wrong or what?

2. logx = 2 cos x, 0<x<2pi

Answer: 1.38, 5.07

Attempts:

plug and chugged multiple choice answers, don't understand it

## Homework Equations

sin2x = 2sinxcosx

cos2x = 2cos^2(x) - 1

cos2x = 1 - 2sin^2(x)

1 = cos^2(x) + sin^2(x)

some other trigonometric identities

Thanks