cos is negative in QII, QIII
You reference angle is 0.927
So, x = pi±0.927
Use inverse trigonometric functions to find a solution to the equation in the given interval. Then find solutions?
cos x = -0.6 , 0<= theta <=2pi
Give your answers in increasing order. Round your answers to two decimal places
x =
x =
1 answer
2 answers