A sub-aquatic drone's descent angle θ \theta\,θ is controlled by a buoyancy system. To maintain stable movement, the angle must satisfy the equilibrium equation:
5cot2θ+3 cosec2θ=2 cosec θ+10 5\cot^2\theta + 3\text{ cosec}^2\theta = 2\text{ cosec }\theta + 10 5cot2θ+3 cosec2θ=2 cosec θ+10Show that this equation can be written in the form
a cosec2θ+b cosec θ+c=0 a\text{ cosec}^2\theta + b\text{ cosec }\theta + c = 0 a cosec2θ+b cosec θ+c=0where aaa, bbb, and c c\,c are integers to be found.
Hence, given that the drone is tilted at an obtuse angle θ \theta\,θ that satisfies this stability equation, determine the exact value of tanθ\tan \thetatanθ. Fully justify your answer.
54 exam-style questions on Edexcel A Level Maths Trigonometric Functions, covering 6.1 Secant, Cosecant and Cotangent, 6.2 Graphs of Sec x, Cosec x and Cot x, 6.3 Using Sec x, Cosec x and Cot x, 6.4 Trigonometric Identities, and 6.5 Inverse Trigonometric Functions. Each one has a worked solution and a mark scheme showing where the marks go.