Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 2 - Section 2.1 - Definition II: Right Triangle Trigonometry - 2.1 Problem Set: 82

Answer

Option- c. 4

Work Step by Step

Given expression is- = $ 4 \cos^{2} 30^{\circ}$ + $ 2 \sin 30^{\circ}$ = $ 4 (\frac{\sqrt 3}{2})^{2} + 2(\frac{1}{2})$ ( substituting for exact values of trigonometric functions) = $ 4(\frac{3}{4}) + 1$ = 3+1 = 4
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