If , , and , find the number of possible ordered pairs…

MATHEMATICS · Subjective · A Level · Mathematics · Trigonometry · Trigonometry

Problem

If 0≤x≤3π0\leq x\leq3\pi, 0≤y≤3π0\leq y\leq3\pi, and cos⁡x⋅sin⁡y=1\cos x\cdot\sin y=1, find the number of possible ordered pairs (x,y)(x,y).

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