A) Show that sin 3x = 3 sin x - 4 sin³ x b) Use identity in (a) to find all solutions in the interval (-180⁰,180⁰) that satisfy the equation 2 sin 3x + cos 2x - 1 = 0

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

answer: '

the distance between points l and m

step-by-step explanation: