Question

csc2∅(1 + cos∅)(1-cos∅)=k​

Answer 1

Answer:

Answer is 1

Step-by-step explanation:

• Firstly (1 + cos theta)(1 - cos theta) can be written as (1 - cos^2 theta) {a^2 - b^2}
• (1 - cos^2 theta) can be written as (sin^2 theta) { 1st identity of trigonometry)
• (cosec^2 theta) can be written as ( 1 / sin^2 theta)
• after simplifying sin^2 theta will cutted and 1 will be the answer