Brilliant

Home Courses Today

Excel in math and science.

Log in with Facebook Log in with Google Log in with email

Join using Facebook Join using Google Join using email

Forgot password? New user? Sign up

Existing user? Log in

A geometry problem by Charlton Teo

Geometry

Which of the following is equal to

$- \frac {\sin^4 \theta + \cos^4 \theta-1}{2}$

for all values of $\theta ?$

\sin^2 \theta \times \cos^2 \theta

1

\frac {\sin^2 \theta}{\tan^8 \theta}

\frac {\cos^8 \theta + \cos^6 \theta}{2}

View solutions

Your answer seems reasonable. Find out if you're right!

Sign up to access problem solutions.

That seems reasonable. Find out if you're right!

Sign up to save your progress!

Log in with Facebook Log in with Google Log in with email

Join using Facebook Join using Google Join using email

Forgot password? New user? Sign up

Existing user? Log in

by Charlton Teo

×

Problem Loading...

Note Loading...

Set Loading...