Question

calculati sin30 grade x cos60 grade +cos 30 grade x sin 60 grade pls urgent

Answer 1

sin(30°)•cos(60°)+cos(30°)•sin(60°)=
$=\dfrac{1}{2}\cdot\dfrac{1}{2}+\dfrac{\sqrt{3}}{2}\cdot\dfrac{\sqrt{3}}{2}=$
$=\dfrac{1}{4}+\dfrac{3}{4}=$
$=\dfrac{4}{4}=$
$=1$

Answer 2

sin 30° × cos60° = 1/2 × 1/2 = 1/4 

cos30° × sin60° = √3/2 × √3/2= 3/4

suma acestora va fi ... 1/4 + 3/4 = 4/4 = 1 !!!