Question

simplify ?
(cos(-x)/tan(-x)) - sin(x)

Answer 1

As i Remember the final answer will be
-cos^2x

Answer 2

possible answers are
a. -secx
b. cscx
c. secx
d. -cscx

Answer 3

Note that cos(-x)=cosx &
tan(-x)=-tanx where x is in the first quadrant
(cos(-x)/tan(-x)) - sin(x)
=(cosx)(-(cosx)/(sinx))-sinx
=\[((-\cos ^{2}x)/sinx) -sinx\]
=\[(-\cos ^{2}x-\sin ^{2}x)/ sinx\]
=-1/sinx
=-cscx

Answer 4

thats for your help PaxPolaris