What is the value of the expression sin θ × cos θ when θ = 45°?
A ray starting at the origin of a coordinate grid makes an angle of θ radians with the positive half of the x-axis and intersects a circle with diameter 64 at the point (163,-16).
What is the value of θ?
140° is equivalent to how many radians?
Find sin A if angle A lies in quadrant IV and cos A=14