Question

sin 4 theta

hey, how do you simplify sin 4 theta? using double angle theory?

Answer 1

\[\sin(4\theta) = \sin(2\cdot2\theta)\] You would use the double angle formula twice here.

Answer 2

sin(4theta)=2sin(2theta)cos(2theta)=4sin(theta)cos(theta)cos(2theta)

Answer 3

are u sure?

Answer 4

yes, it is by formula sin(2x)=2sin(x)cos(x)

Answer 5

ok, thank you. i'll give you a medal then. :)

Answer 6

thx~

Answer 7

thank you for helping me.