Example

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

Question

$$\cos \theta - \sin \theta =$$

Evaluate

$\cos(\theta )-\sin(\theta )$

Differentiate w.r.t. θ

$-\sin(\theta )-\cos(\theta )$

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