If sec θ + tan θ = p then find the value of cosec θ.
It is given 
…(1)
We know that, 
⇒ 
= 
= 
…(2)
Adding (1) and (2)
We get 
∴ 
⇒
We know 
(∵ (a + b)2 = a2 + b2 + 2.a.b)
((∵ (a–b)2 = a2 + b2–2.a.b)
Now we know,
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If sec θ + tan θ = p then find the value of cosec θ.
It is given …(1)
We know that,
⇒
=
= …(2)
Adding (1) and (2)
We get
∴
⇒
We know
(∵ (a + b)2 = a2 + b2 + 2.a.b)
((∵ (a–b)2 = a2 + b2–2.a.b)
Now we know,