Question

In a sin Alfa =1/2,then find the value of 3sin Alfa -4 sin cube alfa

Answer 1

Given

sin α = 1/2

3sin α -4 sin³ α

=3(1/2)-4(1/2)³

=3/2-4(1/8)

=3/2-1/2

=2/2

=1

hope helped !