SOLUTION: cosy= -4/5 , sin x =-12/13 , y is in the third quadrant, and x is in the fourth quadrant; evaluate sin 2 y .
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Trigonometry-basics
-> SOLUTION: cosy= -4/5 , sin x =-12/13 , y is in the third quadrant, and x is in the fourth quadrant; evaluate sin 2 y .
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