Question

if angle A=60°,then 3sin3 A-4sinA​

Answer 1

HI MATE YOUR ANSWER IS HERE:

=3sin3A - 4sinA

=3sin3×60 - 4sin60

= 3sin180 - 4×√3/2

= 3×-1 - 2√3

= -3-2√3 =-√3(√3+2)

HOPE IT HELPS YOU