Please look at the image. I already figured out *b*, which I'm pretty sure is 2pi/3. However, I'm confused on figuring out *a. *This is what I tried:

y= -2sin(3x)+1

y= -2sin(3*-pi/12)+1

y= -2sin(-pi/4)+1

I used the unit circle to find sin(-pi/4).

y=-2(-√2/2)+1

y=√2+1

y=2.41421356

My answer isn't correct, so could anyone please explain how I should solve for *b? *Thanks!

nimimimi Jul 4, 2021

#1**+3 **

When x = - pi/12 what is sin -3 pi/12 ? = - sqrt2/2

-2 * -sqrt2/2 +1 = a

Do simialr for 'b' 2* sin 3b + 1 = 1

2 * sin 3b = 0

sin 3b = 0

b = pi/3

ElectricPavlov Jul 5, 2021