Question #cdf91
1 Answer
Oct 7, 2016
Using the following:
-
#(x+y)(x-y)=x^2-y^2# -
#csc(x) = 1/sin(x)# -
#csc^2(x) - 1 = cot^2(x)#
we have
#=(sin(A)csc(A)+sin(A))/(csc^2(A)-1^2)#
#=(sin(A)*1/sin(A)+sin(A))/(csc^2(A)-1)#
#=(1+sin(A))/cot^2(A)#
