Question

Sin 30 × cos 60 - 2sin 60 cos 30

Answer 1

Answer:

$= \frac{1}{2} \times \frac{1}{2} - 2 \times \frac{ \sqrt{3} }{2} \times \frac{ \sqrt{3} }{2} \\ = \frac{1}{4} - \frac{3}{2} \\ = \frac{1 - 6}{4} \\ = \frac{ - 5}{4}$