91Ó°ÊÓ

Convert the following to radian measure. \(30^{\circ}, 120^{\circ}, 315^{\circ}\)

Convert the following to radian measure. \(990^{\circ},-270^{\circ},-540^{\circ}\)

Differentiate (with respect to \(t\) or \(x\) ): \(f(t)=\csc t\)

Construct angles with the following radian measure. \(\pi / 6,-2 \pi / 3,-\pi\)

A Model for Blood Pressure A person's blood pressure \(P\) at time \(t\) (in seconds) is given by \(P=100+20 \cos 6 t\). (a) Find the maximum value of \(P\) (called the systolic pressure) and the minimum value of \(P\) (called the diastolic pressure) and give one or two values of \(t\) where these maximum and minimum values of \(P\) occur. (b) If time is measured in seconds, approximately how many heartbeats per minute are predicted by the equation for \(P ?\)