Question

sin 20°cos 40°+ cos20°sin 40°=​

Answer 1

Formula to be used:-

sin(A+B) = sinA cosB + cosA sinB

Process :-

sin20° cos40°+cos20° sin40°

=sin (20+40)

=sin (60)

Hence, your answer will be:-

$\huge\boxed{\frac{\sqrt{3} }{2} }$