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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Mohamed Sayed asked Mar 7, 2023

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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

Mohamed Sayed asked Mar 7, 2023

by Mohamed Sayed

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14 votes

B.150 is it I promise

Gpierris answered Mar 9, 2023

by Gpierris

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15 votes

Answer:

60°

A is correct

Given:

Divide by 4

Taking square root both sides

Hence, x=60° is correct

EngrStudent answered Mar 14, 2023

by EngrStudent

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