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tignometry query

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spiderman:
Tahnks ssooo much

spiderman:
Please can someone help me with the 4th question in the attached past paper

astarmathsandphysics:
i)The equilibrium is at y=3. c=3, the displacement of the curve from equilibrium. The amplitude a =6 and the perid from the gaph is pi so b=2pi/pi=2

ii)y=0 so 6sin(2x)+3=0 so sin(2x+3)=-0.5 so
2x=sin-1-0.5=-30

2x=180--30=210 x=105
2x=360+-30=330 so x=165
2x=540--30=570 so x=285
2x=720+-30=690 so x=345

spiderman:
Thank you so much astar

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