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OpenStudy (anonymous):
Apply the angle sum and difference formulae to supply the missing entries in the each expression. Moreover, compute the exact value of each expressions. (a) sin(55∘) cos(125∘) + cos(55∘) sin(125∘) = sin(______________) = ___________
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OpenStudy (mathstudent55):
sin (x + y) = sin x cos y + cos x sin y
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