Q42 of 268 Page 4

Find the value of
, if cosec A = 2

Given: cosec A =2

Now, we have to find

First, we simplify the above given trigonometry equation, we get

Taking the LCM, we get

[∵ cos²θ +sin² θ = 1]

[∵ cosec θ ]

⇒ cosec A

⇒ 2

Find the value of

, if sin A = and cos B=

Find the value of

sec A. tan A+tan²A – cosec A, if tan A =2

If , prove that : 3 cos B – 4cos³ B = 0

If , prove that: 3sinθ – 4sin³θ = 1.

Find the value of, if cosec A = 2