Question

Please help me for part c how to do part c of this questions
The equation h = 7 cos (pi/3 t) models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched and then released.

a. Solve the equation for t.
b. Find the times at which the weight is first at a height of 1 cm, of 3 cm, and of 5 cm above the rest position. Round your answers to the nearest hundredth.
c. Find the times at which the weight is at a height of 1 cm, of 3 cm, and of 5 cm below the rest position for the second time. Round your answers to the nearest hundredth.

Answer 1

In your shoes one of the first things I'd do would be to graph the given function on the interval [0, 10]. such a graph would enable you to estimate the required times. Then I'd use trig to calculate those times more accurately.

Answer 2

I know for a and b .so I just need for C. Please

Answer 3

Ok

Answer 4

Will madel and fan please.

Answer 5

Please help me for (c)

Answer 6

will you show b ?

Answer 7

for below take h=-1,-3,-5

Answer 8

How to do that like
3 arccos^-1(1/7)/pai

Answer 9

Please show me how to do all steps by steps please.

Answer 10

Do any body knows how to do this?

Answer 11

\[-\frac{ 1 }{ 7 }=\cos \left( \frac{ \pi }{ 3 } \right)t,\frac{ 1 }{ 7}=\cos \left( \pi- \frac{ \pi }{ 3 }\right)t\]
and
\[\frac{ 1 }{ 7 }=\cos \left( \pi+\frac{ \pi }{ 3 } \right)t\]
solve as usual