Question

3 sin 60 degree - 2 cos square 30- 1
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Answer 1

Step-by-step explanation:

3 sin 60 Degree - 2 cos^2 30degree - 1

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

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

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

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

$= \frac{3 \sqrt{3} - 5}{2}$