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Find the exact value of the expressions cos(a+B), sin(a+B) and tan(a + B) under the following conditions 24 12 sin(a) = a lies in

Find the exact value of the expressions cos(a+B), sin(a+B) and tan(a + B) under the following conditions 24 12 sin(a) = a lies in quadrant I, and sin(B) = lies in quadrant II. 25 13

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