Question

how do you calculate 4sin2(theta) without a calculator?

Answer 1

what is the value of theta??

Answer 2

u can use formula...sin2a=2sinacosa

Answer 3

theta = pi/6

thanks!

Answer 4

then ur question reduces to 8 sin theta * cos theta..

Answer 5

sin (2*pi/6)=sin (pi/3)=sqrt(3)/2
4 sin (pi/3)=2 sqrt(3)

Answer 6

how can i reduce sin4theta?

Answer 7

sin4theta=2sin 2theta* cos 2 theta

Answer 8

again\[\cos2 \theta =\sqrt{1-\sin^ 2 2\theta}\]

Answer 9

thanks!