Friday

January 30, 2015

January 30, 2015

Posted by **sophie** on Friday, May 29, 2009 at 7:43pm.

1. Write a cosine function with phase shift 0 for height above water of the initial point after t seconds.

a. h=8cos((2π)/2 t)+7

b. h=-8cos3t+7

c. h=-8cos((2π)/3 t)+7

d. h=8cos3t+7

I think this is C?

2. use your function to find the height of the initial point after 5.5 seconds.

a. 7.5 ft

b. 11 ft

c. 10.4 ft

d. 6.5 ft

- Math -
**bobpursley**, Friday, May 29, 2009 at 8:02pmThe period is clearly 60/20 seconds, or 3 seconds.

the cosine function should be of the form

cos(2PI/period* t)

C. is correct.

- Math -
**sophie**, Friday, May 29, 2009 at 8:26pmso would 2. be C as well?

**Answer this Question**

**Related Questions**

Pre-Calculus - The paddle wheel of a boat measures 16 feet in diameter and is ...

Pre-Calculus - The paddle wheel of a boat measures 16 feet in diameter and is ...

Pre-Calculus - The paddle wheel of a boat measures 16 feet in diameter and is ...

Pre-Calculus - The paddle wheel of a boat measures 16 feet in diameter and is ...

Math Grade 12 - The paddle wheel of a boat measures 16 feet in diameter and is ...

Physics - A 500.0 kg object is attached by a rope through a pulley to a paddle-...

physics - A copper container of mass 100g contains 500g of water. A steel paddle...

Math - A paddle on an antique windmill needs to be visually inspected by a ...

mechanics - Find the total kinetic energy of a 1500 g wheel, 700 mm in diameter...

Math - If a bicycle has a crankshaft of 40 teeth, and there are three rear ...