# Practice Exercises for Trigonometry

Recent questions in Trigonometry
Monverdeitum 2023-03-27

## What is the derivative of ${\mathrm{cot}}^{2}x$ ?

Junior Hess 2023-03-27

## How to evaluate $\mathrm{sin}\left(\frac{-5\pi }{4}\right)$?

Zachariah Ferrell 2023-03-26

## How to verify the identity: $\frac{\mathrm{cos}\left(x\right)-\mathrm{cos}\left(y\right)}{\mathrm{sin}\left(x\right)+\mathrm{sin}\left(y\right)}+\frac{\mathrm{sin}\left(x\right)-\mathrm{sin}\left(y\right)}{\mathrm{cos}\left(x\right)+\mathrm{cos}\left(y\right)}=0$?

Daisy Hatfield 2023-03-26

## Find $\mathrm{tan}\left(22.{5}^{\circ }\right)$ using the half-angle formula.

Joslyn Landry 2023-03-25

## The solution set of $\mathrm{tan}\theta =3\mathrm{cot}\theta$ is

atentan4t9j 2023-03-25

## How do I find the value of sec(3pi/4)?

Trey Montes 2023-03-25

## How to find the exact values of $\mathrm{cos}22.5°$ using the half-angle formula?

Keegan Stevens 2023-03-25

## How to express the complex number in trigonometric form: 5-5i?

Lacey Cordova 2023-03-24

## How to find the value of $\mathrm{csc}90$?

taxiereneo5k 2023-03-24

## Two lines perpendicular to a same line are parallel. A. True B. False

Pieszkowo3gc4 2023-03-24

## How many diagonals are there in a nonagon? A.24B.16C.18 D.27

Kira Yoder 2023-03-23

## How to find the exact value of tan(5pi/3)?

Eliza Shields 2023-03-23

## How to do inverse cosine?

Beckett Aguirre 2023-03-23

## If tan x=11/r and cos x=r/s what is the value of sin x?

zookeeper1930r8k 2023-03-22

## Find the value of the trigonometric functions of sin (−11π/3).

caigis72da 2023-03-22

## How to find the value of $\mathrm{csc}\left(\frac{5\pi }{4}\right)$?

Abraham Reilly 2023-03-22

## $\left(\mathrm{sin}4\theta \right)$ can be written as:A) $4\mathrm{sin}\theta \left(1-2{\mathrm{sin}}^{2}\theta \right)\left(\sqrt{1-{\mathrm{sin}}^{2}\theta }\right)$B) $2\mathrm{sin}\theta \mathrm{cos}\theta {\mathrm{sin}}^{2}\theta$ C) $4\mathrm{sin}\theta –6{\mathrm{sin}}^{3}\theta$ D) None of these

Sawyer Burch 2023-03-22