Question
Find the simplified value of the following expression if
a = 30o [(sin2a + cos2a} ÷ seca × sina ÷ cosa]Solution
[(sin2a + cos2a} ÷ seca × sina ÷ cosa] = (1/seca) × (sina/cosa) = cosa × (sina/cosa) = sina = sin30o = (1/2)
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