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How do I find the amplitude, period, horizontal shift and vertical shift for the graph of y=3sin2(θ-30)+1?
I know the amplitude will be 3 but I don't know the rest.
Help please
Thanks a lot
3 Answers
- LauraLv 45 years ago
period is pi , from 2pi / the 2 after the sin function The horizontal line about which this wave oscillates is shifted 1 up, The amplitude is 3 above and below the shifted horizntal axis Horizontal shift is -pi
- 1 decade ago
Start with y = sinθ
θ --> 2θ so original period is halved to pi
y --> y/3
y = 3sin2θ so original amplitude becomes 3 times
θ --> θ - 30
y = 3sin2(θ-30) so orig graph's shifted to the right by 30
y --> y - 1
y = 3sin2(θ-30) + 1 so original graph's shifted up by 1
amplitude 3 (like you guessed),
period pi,
horizontal shift +30
vertical shift +1