Question 46 Answer and Explanation _ACT June 2018 Form A11 Math Section

Question 46 Answer and Explanation _ACT June 2018 Form A11 Math Section

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46. For all real values of x, which of the following equations is true?

F. sin(7x) + cos(7x) = 7

G. sin(7x) + cos(7x) = 1

H. 7sin(7x) + 7cos(7x) = 14

J. sin²(7x) + cos²(7x) = 7

K. sin²(7x) + cos²(7x) = 1

Answer and Explanation

Your Answer is

Correct Answer is K

Explanation