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If sinA=3/5 and cosB=9/41, 0 < A < pi/2 ...

If `sinA=3/5` and `cosB=9/41, 0 < A < pi/2` and `0 < B < pi/2` then find the values of `(i) sin(A+B) (ii) sin(A-B) (iii) cos(A+B) (iv) cos(A-B)`

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