Sinx = 1/5 , cosy = 2/3, x&y are in quadrant 1. Determine sin(X+y)
This one is so tricky please help math geniuses
This one is so tricky please help math geniuses
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Identity:
sin(a + b) = (sin a)*(cos b) + (sin b)*(cos a)
You will need sine and cosine of both angles.
Find those values with a right triangle and plug in to formula. Then simplify.
sin(a + b) = (sin a)*(cos b) + (sin b)*(cos a)
You will need sine and cosine of both angles.
Find those values with a right triangle and plug in to formula. Then simplify.
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Tricky? Why don't you study the sin and cos of the sum and difference of two angles?
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