Question

Calculati 2sinπ/6 cos3π/4

Answer 1

$2 \sin \frac{\pi}{6} = 2 \times \sin(30) = 2 \times \frac{1}{2} = 1 \\ \cos( \frac{3\pi}{4} ) = \cos(135) = - \frac{ \sqrt{2} }{2}$