Question

9)What is The value of sin² 30° – cos² 30°

Answer 1

Answer:

1/2^2-√3/2^2

1/4-3/4

-2/4

-1/2

Answer 2

$\sin(30) = \frac{1}{2} \\ \sin {}^{2} (30) = \frac{1}{4} \\ \\ \cos(30) = \frac{ \sqrt{3} }{2} \\ \cos {}^{2} (30) = \frac{3}{4}$

Therefore,

sin²30 - cos²30 =

$\frac{1}{4} - \frac{3}{4} = \frac{1 - 3}{4} = \frac{ - 2}{4} = \frac{ - 1}{2}$

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