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Question
Evaluate: sin2 60° + 2tan 45° – cos2 30°.
Sum
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Solution
sin2 60° + 2tan 45° – cos2 30°
= `(sqrt(3)/2)^2 + 2(1) - (sqrt(3)/2)^2`
= `3/4 + 2 - 3/4`
= 2
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