Consider the function , where .
(a) the graph of for , showing the intercepts and the behavior at .
(b) Solve the inequality .
Practice IB Mathematics Analysis and Approaches (AA) Topic SL 3.8—solving Trig Equations with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for SL 3.8—solving Trig Equations and mirrors Paper 1, 2, 3 style where relevant.
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Consider the function , where .
(a) the graph of for , showing the intercepts and the behavior at .
(b) Solve the inequality .
Consider the equation
(a) Show that the equation may be written as:
(b) Express in terms of , and hence obtain a quadratic equation in .
(c) Solve exactly for .
Consider the equation , .
(a) Show that the equation may be written as .
(b) Factor the left-hand side to obtain an equation of the form .
(c) Find all exact values of in the interval that satisfy the equation.
Consider the equation , .
(a) Show that the equation may be written as .
(b) Express in terms of , and hence obtain a quadratic equation in .
(c) Solve exactly for .
The depth of water in a harbour, in metres, is modelled by
where is the time in hours after midnight.
(a) Write down the period of and the greatest depth of water.
(b) Find the exact values of with for which the depth of water is metres.
(c) A ship may enter the harbour only when the depth of water is at least metres. Find the total length of time, in the hours modelled, during which the ship may enter.
(d) A second harbour is modelled by , where , and its first high tide occurs at . Find the smallest possible value of .
(d) all exact values of in the interval that satisfy the original equation.
(e) the graphs of and for , indicating approximate intersections matching the solutions from part 4.
(d) all exact values of in the interval that satisfy the original equation.