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If cos A = (5)/(13), Tan - (-15)/(8) and...

If `cos A = (5)/(13), Tan - (-15)/(8)` and A and B are angles in the fourth quadrant and the second quadrant respectively then find sin (A + B) and cos (A + B). Also determine the quadrant to which the angle (A + B) relates.

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The correct Answer is:
`(171)/(221),(140)/(221)` first quadrant
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