Enter a problem...

Trigonometry Examples

Popular Problems

Simplify 2cos(x)^2-1

$2 \cos^{2} (x) - 1$

Step 1

Apply the cosine double-angle identity.

$\cos (2 x)$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$

Please ensure that your password is at least 8 characters and contains each of the following:

a number
a letter
a special character: @$#!%*?&