What is theta at costheta 14 and at 14 Can anyone explain h

Solution

At 1/4, theta= cos^-1(1/4) = 75.52 degrees.

now, when cos(theta) = -1/4

we know that, cos(180-theta) = -cos(theta)

Therefore, 180-theta = 75.52

theta = 180-75.52 = 104.48 ....for cos(theta) = -1/4