1. Convert the angle given in degrees to radian measure in terms of pie.

380*

Round the coefficient to two decimal places

2. Evaluate to four significant digits.

sin^2 pie/3 + cos pie/3

3. 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 the answer to the whole.

i put 9640km its wrong

4. Solve the equation 8- tan theta = 0 for all nonnegative values of theta less than 360* . Do by calculator, if needed, and give the answers to three significant digits in the order of increasing.

i dont understand this question

(Crying)