trig
posted by trig on .
simplify the expression.
cot^2(x)csc^2(x)

csc(x) = csc(x)
sin^2+cos^2 = 1 
But my teacher gave the answer on the review as 1.

but but but ... you should have used my hints.
csc^2(x) = (cscx)^2 = csc^2(x)
sin^2+cos^2 = 1
divide by sin^2 to get
1+cot^2 = csc^2
cot^2  csc^2 = 1
sin^2+cos^2=1 will help solve many problems.