Trigonometric equations Questions and Answers

follow a periodic pattern of rise and fall called the tides The graph below shows the sea level at a certain beach in feet over two days where time t is measured in hours after 12 00 a m midnight on the first day Sea level in feet 8 5 24 20 5 24 25 0 Time in hours 14 5 0 Write an equation in terms of y the sea level in feet and t time in hours to represent the given context

fue for all values of a and B ether the identity of costa B cosacos sinasing is Let P cosa sina and Q cos sin be any two points on the circle O with radius 1 If POA a and QOA 8 then POQ a B P cosa sina Q cos sia p 2 1 1 Make use of the cosine rule to determine the length of PQ 4 1 0 Make use of the distance formula to determine the length of PQ