Question

determine the exact value

Answer 1

Answer:(theta) =π only

Step-by-step explanation:

-4cos(theta)+1=5

Subtract 1 from both sides

-4cos(theta)+1-1=5-1

-4cos(theta)=4

Divide both sides by -4

-4cos(theta) ➗ -4=4 ➗ -4

cos(theta)=-1

(theta)=cos(inverse)(-1)

(theta)=180

(theta)=π