Answer:
A
Step-by-step explanation:
x=π/2 ,3π/2
cot x(csc x+1)=0
either cot x=0
tanx=∞=tan (π/2)
x=π/2
or csc x=-1
or sin x=-1=-sin (π/2)=sin (π+π/2)=sin (3π/2)
x=3π/2
(D)14
17-2x=-11
17+11=2x
28=2x
28/2=2x/2
14=x
x=14
