Question

simplified form of(1+cot2theta)(1-costheta)(1+cos theta​

Answer 1

Answer:

1+cot2 = cosec2

(a+b)(a-b)=a2 -b2

so (1-cos)(1+cos)=1-cos2

and 1-cos2=sin2

so (cosec2)(sin2)

=(1/sin2)(sin2)

sin2 cancels each other and remains only 1

so the answer is 1