Question

If 2 sin x + 3 sin y = 5, then cos x + 3 cos y = ?​

Answer 1

Step-by-step explanation:

The maximum value of cos(x) function is 1 which is achieved for x=0.The function cos(x)+cos(y) achieves 2 when x and y are both simultaneously 0.Therefore sin(x)+sin(y) must be 0.

Answer 2

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