Question

(1+cot^2teta)(1-costeta)(1+costeta)=?​

Answer 1

Answer:

Step-by-step explanation:

I am taking theta = $

(1+cot^2$)(1-cos$)(1+cos$)

Cosec^2$(1-cos^2$){as 1+cot^2$ =

cosec^2$ &

(a-b)(a+b)=

( a^2-b^2)}

Cosec^2$.sin^2$ {as 1-cos^2$ =

sin^2$}

1 {As

sin^2$=1/Cosec^2$}