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September 20, 2014

September 20, 2014

Posted by **Melinda** on Wednesday, January 18, 2012 at 9:51pm.

1.Which of the six trigonometric functions are positive in quadrant III?

Answer: tangent and cotangent

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2. What is the amplitude of the function y = pi/2 sin(6/3t - pi/6) + 14?

Amplitude: pi/2

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3. What is the function of cos that has an amplitude of 4, a period of 2pi and has a point at (0,2)?

Answer: y=4cos(x-0) + 2

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4. The height of a swing is modelled by the function h(t) 35sin(8pi x t)+74. What are the highest and lowest points the ball reaches where h(t) is in cm?

- Precalculus -
**Steve**, Thursday, January 19, 2012 at 5:00amwhen x=0, cos(0) = 1

so you want

y = 4cos(x) - 2

74 ± 35

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