trigonometry

Question: $\cot \theta =\sin 2\theta (\theta \ne n\pi $, n is integer), if $\theta =$

1) ${{45}^{o}}$ and ${{60}^{o}}$

2) ${{45}^{o}}$and ${{90}^{o}}$

3) ${{45}^{o}}$only

4) ${{90}^{o}}$only

Solution:

Explanation: No Explanation

Solution of trigonometric equations

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