Select the correct answer. Which of the following is a solution to 4cos2x − 1 = 0? A. 60° B. 150° C. 210° D. 330°

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asked Feb 21, 2023 198k views

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Select the correct answer. Which of the following is a solution to 4cos2x − 1 = 0? A. 60° B. 150° C. 210° D. 330°

Mathematics
high-school

Dwight Spencer asked

by Dwight Spencer

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2 Answers

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B.150 is it I promise

PeMa answered Feb 24, 2023

by PeMa

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2 votes

Answer:

60°

A is correct

Given:

Divide by 4

Taking square root both sides

Hence, x=60° is correct

Mitch Connor answered Feb 26, 2023

by Mitch Connor

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60°

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