Question

(ii) 2 tan2 45° + cos2 30° -- sinº 60°
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Answer 1

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2 tan2 45° + cos2 30° -- sinº 60°

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$2 {tan}^{2} 45 + {cos}^{2} 30 - sin60$

$2 {(1)}^{2} + { ( \frac{ \sqrt{3}}{2} )}^{2} - \frac{ \sqrt{3} }{2}$

$2 + \frac{3}{4} - \frac{ \sqrt{3} }{2} = \frac{4 + 3 - 2 \sqrt{3} }{4}$

$= \frac{7 - 2 \sqrt{3} }{2} \: answer$

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