Question

Refer to attachment ....

100 points​

Answer 1

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(1/root) ^2 - (1/2) ^2*1^2 * (root3) ^2- 2*1^2*1^2*1^2

= 1/3-1/4*1*3 - 2*1*1*1

=1/3-3/4-2

= -29/12

Answer 2

Here's your answer!

> tan² 30° × sin 30° + cos 60° × sin² 90° × tan² 60° - 2tan 45° × cos² 0° × sin² 90°

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

$> \frac{1}{3} \times \frac{1}{2} + \frac{1}{2} \times 1 \times 3 - 2 \times 1 \times 1$

$> \frac{1}{6} + \frac{3}{2} - 2$

$> \frac{1 + 9 - 12}{6}$

$> \frac{ - 2}{6} = \frac{ - 1}{3}$

Hope it helps!