On the unit circle, where 0 < theta < or equal to 2pi, when is tan theta undefined? a. theta=pi and theta=2pi b. sin theta = cos theta c. theta = pi/2 and theta=3pi/2 d. sin theta = 1/cos theta answer within 5 minutes, this is timed.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

The sides of a parallelogram are 24cm and 16cm. the distance between the 24cm sides is 8 cm. find the distance between the 16cm sides