# Sin and Cos

Pro Problems > Math > Algebra > Functions > Trigonometry > Equations## Sin and Cos

Solve for x in the interval [0, 2p)

-2(sin^{2} x)(cos x) + cos^{2} x = 1

Presentation mode

Problem by Mr. Twitchell

## Solution

In order to make it feasible for teachers to use these problems in their classwork, no solutions are publicly visible, so students cannot simply look up the answers. If you would like to view the solutions to these problems, you must have a Virtual Classroom subscription.Assign this problem

Click here to assign this problem to your students.## Similar Problems

### Simple Trig Equation

If (sincosX, and 0 ≤ X < 180, find all possible values of X.

^{2}X)(cosX) =3

4

### Fourth Degree Trig

Find all angle values between zero and 360 inclusive that make the equation true.

8cos^{4}x - 10cos^{2}x + 3 = 0

# Featured Games on This Site

Match color, font, and letter in this strategy game

Mastermind variation, with words

# Blogs on This Site

Reviews and book lists - books we love!

The site administrator fields questions from visitors.

Like us on Facebook to get updates about new resources