Example

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

Question

$$\tan 3 \theta . \tan 2 \theta . \tan \theta = \tan 3 \theta + \tan 2 \theta + \tan \theta$$

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