# Basic trig functions - practice problems

These problems are designed to help you learn basic trigonometry ("trig") functions and how to use your calculator correctly.*Try solving these on your own (without peaking at the solutions). You may want to download a sheet with all the questions (Acrobat (PDF) 33kB Jul25 09) to print out and try. If you need help, look at the hidden solutions. You may use a calculator.*

## Calculating sine, cosine, and tangent

**Problem 1. The angle of repose for sand is typically about 35°. What is the sine of this angle?**

Problem 2. When driving, a steep hill is typically only 12°. What is the cosine of this angle?

Problem 2. When driving, a steep hill is typically only 12°. What is the cosine of this angle?

**Problem 3. The angle that waves hit a shoreline is 75°. What is the tangent of this angle?**

For the next three problems, use the photo of Mount Rainier below.

For the next three problems, use the photo of Mount Rainier below.

**Problem 4.**

**What is the sine of angle A?**

**Problem 5.**

**Determine angle A in degrees.**

Problem 6.

Problem 6.

**What is the cosine of angle B?**