Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\tan\ \alpha+cot\alpha$$

Evaluate

$\frac{2}{\sin(2\alpha )}$

Differentiate w.r.t. α

$-\frac{4\cot(2\alpha )}{\sin(2\alpha )}$

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