हल करना cos 2x - sin 2x = - 1 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$\cos\ 2x-\sin\ 2x=-1$$