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Question
Evaluate:
5sin2 45° − sec 60° cot2 30°.
Evaluate
Solution
We have, 5sin2 45° − sec 60° cot2 30°
= `[5 xx (1/sqrt2)^2] - (2 xx (sqrt3)^2)`
= `(5 xx 1/2) - (2 xx 3)`
= `5/2 - 6`
= `(5 - 12)/2`
= `(-7)/2`
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