Math Help - Trig Help ( verify answers)

1. Trig Help ( verify answers)

Convert the angle given in degrees to radian measure in terms of .380°

i got 6.63 rad

to 4 sig.figs
1.018

Solve the equation for all nonnegative values of less than . Do by calculator, if needed, and give the answers to three significant digits in the order of increasing.
(not sure what to do)

A satellite is in a circular orbit 225 km above the equator of the earth. How many kilometres must it travel for its longitude to change by 86.3°?
Assume the radius of the earth equals 6400 kilometres.(round to the nearest whole number)
i got 9639.80 =9600

2. Originally Posted by rock candy
Convert the angle given in degrees to radian measure in terms of .380°

i got 6.63 rad
Unfortunately, I cannot see any of your attachments.
"6.63 rad" is the NUMERICAL value but the problem asked you give it in terms of $\pi$: Since there are 360 degrees or $2\pi$ radians so the conversion factor is $\frac{2\pi}{360}= \frac{\pi}{180}$ radians per degree. $\frac{\pi}{180}(380)= \frac{380}{180}\pi$. Just do the fraction part.

Unfortunately, I cannot see the attachments.

to 4 sig.figs
1.018

Solve the equation for all nonnegative values of less than . Do by calculator, if needed, and give the answers to three significant digits in the order of increasing.
(not sure what to do)

A satellite is in a circular orbit 225 km above the equator of the earth. How many kilometres must it travel for its longitude to change by 86.3°?
Assume the radius of the earth equals 6400 kilometres.(round to the nearest whole number)
i got 9639.80 =9600