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# Calculator Trigonometry Practice Questions

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Updated on Oct 1, 2011

Read the following study guide for a concept review:

Calculator Trigonometry Study Guide

## Practice Questions

Estimate each of the trigonometric values to three decimal places with a calculator.

 1 sin(50°) 2 cos(30°) 3 tan(85°) 4 sin(315°) 5 cos( –80°) 6 tan(l4°) 7 8 cos(π) 9 10 11 cos(8.63) 12

Evaluate each trigonometric value to three decimal places with a calculator.

 13 sec(18°) 14 csc(412°) 15 cot(–23.1°) 16 17 18 cot(2.61)

Use a calculator to estimate the length x in each triangle.

 19 20 21 22 23 24 25 26 27

### Answers

 1 sin(50°) ≈ 0.766 2 cos(30°) ≈ 0.866 3 tan(85°) ≈ 11.430 4 sin(315°) ≈ –0.707 5 cos(–80°) ≈ 0.174 6 tan(14°) ≈ 0.249 7 sin ≈ 0.588 8 cos(π) = –1 9 tan = 1 10 sin ≈ –0.309 11 cos(8.63) ≈ –0.700 12 tan ≈ 1.732 13 sec(18°) ≈ 1.051 14 csc(412°) ≈ 1.269 15 cot(–23.1°) ≈ –2.344 16 sec ≈ 1.015 17 csc ≈ –1.414 18 cot(2.61) ≈ –1.701 19 x ≈ 1.452 ft. 20 x ≈ 6.180 in. 21 x ≈ 11.706 ft. 22 x ≈ 5.016 in. 23 x = 4 ft. 24 x ≈ 14.142 ft. 25 x ≈ 140.042 ft. 26 x ≈ 12.361 ft. 27 x ≈ 20.840 m
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