Please explain how to prove this.
Attachments:
Answers
Answered by
1
Answer:
here's your answer
and I'll not beg you to mark it as brainlist
Attachments:
Answered by
2
Answer:
(cosec^2A)^3-(cot^2A)^3
=(cosec^2A-cot^2A)(cosec^4A+cosec^2A cot^2A+cot^2A)
=(cosec^2A)^2+cot^4A+cosec^2A cot^2A
=(1+cot^2A)^2+cot^4A+cosec^2Acot^2A
=1+cot^4A+2cot^2A+cot^4A+cosec^2A cot^2A
=1+2cot^4A+2cot^2A+cosec^2A cot^2A
=1+2cot^2A(1+cot^2A)+cosec^2A cot^2A
=1+2cot^2Acosec^2A+cosec^2A cot^2A
=1+3cot^2Acosec^2A
Similar questions