Question

pls answer me......?????????

Answer 1

1.since the power is negative therefore infinite number of terms are present

2.we know that

sin3x=3sinx - 4sin**3x

=3*1/2 - 4*1/8

=1.5-0.5

=1

3.|a+ib|=(a**2+b**2)**1/2

=(3+1)**1/2

=2