Question

sin(π) / 4 × cos(π) / 3 – ctg(3 × π) / 2 × sin(π) /2

Answer 1

$\sin( \frac{\pi}{4} ) \cos( \frac{\pi}{3} ) - \cot( \frac{3\pi}{2} ) \sin( \frac{\pi}{2} ) = \frac{ \sqrt{2} }{2} \frac{1}{2} = \frac{ \sqrt{2} }{4} = \frac{1}{2 \sqrt{2} }$