Select the correct choices that complete the sentence below. The value of cos 390° is because 390° is in quadrant V The reference angle is V and the exact value of cos 390° is
Select the correct choices that complete the sentence below. The value of cos 390° is because 390° is in quadrant V The reference angle is V and the exact value of cos 390° is
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE:
1. Give the measures of the complement and the supplement of an angle measuring 35°.
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Transcribed Image Text:Select the correct choices that complete the sentence below.
The value of cos 390° is
V because 390° is in quadrant
The reference angle is
and the exact value of cos 390° is
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Expert Solution
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Solution-
Before completing this sentence i want to make understand some basic things about this question
So here asking about cos 390°
So we know that in quadrant after 360° value repeat itself so if we want to calculate value which it above 360° we can subtract 360° from that value and result will unchange.
Example- sin 390 = sin (360+30)
= sin 30
Sin 390 = 1/√2 and the value of sin 30° is also same
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