Find the approximate value of the trigonometric function. If necessary, round to the nearest thousandth. Given sin θ = 0.982; find cos θ

Answer 1

Sin (theta)^2 + cos(theta)^2 = 1

so 0.982^2 + cos(theta)^2 = 1

0.964 + cos(theta)^2 = 1

cos(theta)^2 = 0.036

cos(theta) = 0.189 (in 1st quadrant and -0.189 in 2nd quadrant)