Answer with explanation:
It is given that, Angle θ is in standard position.
A line from origin O to point , P(8,-15) is joined and then perpendicular to x and y axis, is drawn cutting X axis at Point M and Y axis at point N.
OM= 8 units
ON=P M=15 units
By Pythagorean Theorem

Point(8,-15), lies in Quadrant four. In Quadrant four Cosine and Secant Function are positive and all other trigonometric functions, Sine,Cosecant, Tangent,and Cotangent are Negative.