Question

find the value of sin330•cos120°+cos(210°)•sin300°​

Answer 1

sin330= -sin30 = -(1/2)

cos120=-cos60 = -(1/2)

cos210= -cos30 =(-√(3)/2)

sin300=-sin60 = (-√(3)/2)

Putting these values in below equation, we get---------

sin 330.cos 120+cos 210.sin 300

=(-1/2)(-1/2) + (-√(3)/2)(-√(3)/2)

= 1/4+3/4

=1

Answer 2

Answer:

1 is the value