Question

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$\mathscr{\blue{Answer \: the \: Question \: in \: Attachment}}$


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Answer 1

Answer:

Option(B)

Step-by-step explanation:

Some important formulas:

(i) tan⁻¹(1/x) = cot⁻¹x

(ii) tan⁻¹x - tan⁻¹y = tan⁻¹(x - y)/(1 + xy)

(iii) Sum of first n natural numbers = n(n + 1)/2

The answer is explained in the attachment.

Hope it helps!

Answer 2

Answer:

Refer to the Attachment.

Hope it Helps !!!