Please help with this math question

A tuba player plays the note E and sustains the sound for some time. For a pure E the Variation in pressure from normal air pressure is giVen by the function V dened below. Wt) : Elsinlfnt) 1where V is measured in pounds per square inch and t: is measure in seconds. Use the given function and the graph below to ansWer {a} through {d}. Show the algebra and trigonometry you use to find the exact ansWers as a reduced fraction and as a decimal. {a} 1|What is the period for V? {II} The graph to the left shoWs ho'wr man}.r periods? {c} Use an appropriate eqUation to find the coordinates for the point A on the graph. Hints: Maximum occurs when sin(nt} : 1 a That is. a maximum occurs when Emir: = E {d} Use an appropriate equation to find the coordinates for the point B on the graph. Hints: intercept occurs when D.25in(EtDrrt) : [It That is, an intercept occurs when Ba't : 3r