Card 1 of 21
The reciprocal of cosine is [...]\text{[...]}[...].
A
The reciprocal of cosine is secθ=1cosθ\boxed{\sec\theta=\frac{1}{\cos\theta}}secθ=cosθ1.
B
θ=kπ\theta=k\piθ=kπ, where k∈Zk\in\mathbb{Z}k∈Z.
C
The reciprocal of sine is cscθ=1sinθ\boxed{\csc\theta=\frac{1}{\sin\theta}}cscθ=sinθ1.
D
−π2<arctanx<π2-\frac{\pi}{2}<\arctan x<\frac{\pi}{2}−2π<arctanx<2π.
Card 1 of 21
1.5.8 Reciprocal and inverse trigonometric ratios (A-level only) Flashcards
21 flashcards on OCR A Level Maths 1.5.8 Reciprocal and inverse trigonometric ratios (A-level only): the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.