NCERT Class 10 Chapter 8 Trigonometry Official CBSE Board Sample Problems Long Answer

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Question

If

Solution

So,

Question

Prove that

Solution

Question

If , prove that

Solution

We have (Given)..(i)

We know that

…(ii)

Adding (i) and (ii) we get

And

Question

If sin and, find the value of:

Solution

(Given)

s )

Also (Given)

(As )

... (ii)

Solving (i) and (ii) for A and B, we get and

(j)

(ii)

Question

If , find the value of:

Solution

Give

Now put values of and in the given expression

We get

Question

Solution

Taking LHS

RHS

Question

Prove:

Solution

LHS

RHS

Now LHS=RHS

Question

Prove that

Solution

Question

If then find the value of CosecX

Solation

Adding 1 and 2 we get

On subtracting 2 from 1 we get

Question

Solution

LHS