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  3. given that sin(a) = 1/3 and cos(b) = -2/6 with a a

Given that sin(a) = 1/3 and cos(b) = -2/6 with a and b both in...

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Calculus

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Given that sin(a) = 1/3 and cos(b) = -2/6 with a and b both in the interval [ ?/2, ?], find the exact values of sin(a + b) and cos(a ? b).

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