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Mathematics 21 Online
OpenStudy (anonymous):

If sin(x) = 1/3 and sec(y) = 5/4, where x and y lie between 0 and π/2, evaluate sin(x + y).

rishavraj (rishavraj):

apply sin(x+y) = sin(x)cos(y) + cos(x)sin(y)...plug the values

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