Prove the identity: cosec2x−cot2x≡1\operatorname{cosec}^2x - \cot^2x \equiv 1cosec2x−cot2x≡1
Prove the identity: (cosecx+sinx)2≡cosec2x+2+sin2x(\operatorname{cosec}x + \sin x)^2 \equiv \operatorname{cosec}^2x + 2 + \sin^2x(cosecx+sinx)2≡cosec2x+2+sin2x
274 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.