3. Geometry and Trigonometry

Simple Identities — Quiz

Test your understanding of simple identities with 5 practice questions.

Practice Questions

Question 1

Which identity shows that $\sin^2\theta+\cos^2\theta=1$ for any angle $\theta$?

Question 2

If $\cos\theta=\dfrac{3}{5}$ and $\theta$ is in the first quadrant, what is $\sin\theta$?

Question 3

Which identity is equivalent to $1-\sin^2\theta$?

Question 4

Which identity is true for all angles $\theta$ where $\cos\theta\neq 0$?

Question 5

If $\tan\theta=2$ and $\cos\theta>0$, what is $\sin\theta$?