Question

Solve the following trig equation for 0°≤θ<360°
-4cos2θ=-3

Answer 1

=> cos2theta=3/4
=>2theta=cos^-1(4/3)
=>theta={cos^-1(4/3)}/2

solve it to get result..

Answer 2

but error in calculaton?

Answer 3

in which step..?

Answer 4

when i typed it in the calc....

Answer 5

so is that the answer?

Answer 6

oh soreey..it is 3/4 not 4/3...i typed wrog...

Answer 7

it would be 20.8

Answer 8

oh okay thanks! :)