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Standard Values

Question 1 ii...

Question

Question 1 (ii)
Evaluate the following:
(ii) $2 t a n^{2} 45^{\circ} + c o s^{2} 30^{\circ} - s i n^{2} 60^{\circ}$

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Solution

(ii) $2 t a n^{2} 45^{\circ} + c o s^{2} 30^{\circ} - s i n^{2} 60^{\circ}$
$= 2 \times (1)^{2} + (\frac{\sqrt{3}}{2})^{2} - (\frac{\sqrt{3}}{2})^{2} = 2$

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Q. Question 1 (ii)
Evaluate the following:
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2 t a n^{2} 45^{\circ} + c o s^{2} 30^{\circ} - s i n^{2} 60^{\circ}

2 {tan}^{2} 45 + {cos}^{2} 30^{\circ} - {sin}^{2} 60^{\circ}

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(ii) 4cot ^₂ 45

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Evaluate the following

(i) sin60° cos30° + sin30° cos 60°

(ii) 2tan²45° + cos²30° − sin²60°

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2 t a n^{2} 45^{\circ} + 3 c o s^{2} 30^{\circ} - s i n^{2} 60^{\circ} =

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