Mathematics, 16.05.2021 08:30 lee1677

So If tan of x = -40/9 and x is in Quadrant 2 and sin y = -3/5 and y is in Quadrant 4 How do you find the exact value for cos(x-y) and tan (x+y)

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So If tan of x = -40/9 and x is in Quadrant 2 and sin y = -3/5 and y is in Quadrant 4 How do you f...