Answer:
C) cos²(theta)
Step-by-step explanation:
csc(X) = 1/sin(X)
cos(-X) = cos(X)
tan(-X) = -tan(X)
cot(-X) = -1/tan(X) = -cos(X)/sin(X)
[cos(X) × -cos(X)/sin(X)] ÷ -1/sin(X)
-cos²(X)/sin(X) × -sin(X)
cos²(X)
