Question

a hint will do... I'll work myself out of it
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Answer 1

first rationalise then put value and solve

hope it might work.

Answer 2

Answer:

Step-by-step explanation:

Break tanx and cot x in terms of sinx and cosx......finally cross multiplying and cancelling will give you:-

(sin^2x+cos^2x)/(sin^2x- cos^2x)

= 1/(sin^2x- cos^2x)

=1/-cos 2x

Then apply limit....just provided the hint