Solve, for 360≤θ<720∘360 \leq \theta < 720^\circ360≤θ<720∘, the equation, 3cosθ=8tanθ3 \cos \theta = 8 \tan \theta3cosθ=8tanθ
The first four positive solutions, in order of size, of the equation cos(2a+50)=0.7\cos(2a + 50) = 0.7cos(2a+50)=0.7 are a1a_1a1, a2a_2a2, a3 a_3\,a3 and a4a_4a4. To the nearest degree find the value of a4a_4a4.
41 exam-style questions on Edexcel AS Level Maths Trigonometric Identities and Equations, covering 10.1 Angles in all four Quadrants, 10.2 Exact Values of Trigonometric Ratios, 10.3 Trigonometric Identities, 10.4 Solving Trigonometric Equations, 10.5 Harder Trigonometric Equations, and 10.6 Equations and Identities. Each one has a worked solution and a mark scheme showing where the marks go.