Question

cosec ( 80 + theta) - cot ( 10 - theta) is ???????

Answer 1

Answer:

take reference from this answer I want you to do it yourself

Let cos(20-tetha) remain same..

Let us change Sin(70-tetha)

As we know that...

Sin(90-tetha)=Cos tetha

Sin(70-tetha)=Cos[90-(70+tetha)]

=Cos(20+tetha)

Cos(20-tetha) - Cos(20-tetha) = 0

Hence proved...

Step-by-step explanation:

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