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If θ is an acute angle and cot θ + tan θ = 2, then find the value of tan⁡12θ+cot⁡12θ+2tan⁡5θcot⁡7θ.\tan^{12}{\theta}+\cot^{12}{\theta}+2\tan^5{\t
Question

If θ is an acute angle and cot θ + tan θ = 2, then find the value of tan12θ+cot12θ+2tan5θcot7θ.\tan^{12}{\theta}+\cot^{12}{\theta}+2\tan^5{\theta}\cot^7{\theta}.

A.

4

B.

3

C.

1

D.

2

Correct option is A

Given:
tanθ + cotθ = 2
Solution:

Put the value of θ= 45°,
tan45° = 1, and cot45° = 1
then, tanθ+ cotθ = 2
tan45° + cot45° = 2 \implies​1+1=2

tan12θ+cot12θ+2tan5θcot7θ.tan1245°+cot1245°+2tan545°cot745°112+112+2×1517=4 \tan^{12}{\theta}+\cot^{12}{\theta}+2\tan^5{\theta}\cot^7{\theta}. \\\tan^{12}45° + \cot^{12}45°+2tan^545°cot^745°\\1^{12} +1^{12}+2\times1^51^7 = 4

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