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1.7.15 Sec, cosec and cot functions (A-level only)

Card 1 of 23

Secant: sec⁡x=\sec x=secx= [...]\text{[...]}[...], and it is undefined when cos⁡x=0\cos x=0cosx=0.

A

Secant: sec⁡x=\sec x=secx= 1cos⁡x\boxed{\frac{1}{\cos x}}cosx1​​, and it is undefined when cos⁡x=0\cos x=0cosx=0.

B

sec⁡θ=10\sec\theta=\sqrt{10}secθ=10​.

C

233\boxed{\frac{2\sqrt3}{3}}323​​​

D

Because ∣cos⁡x∣≤1|\cos x|\leq1∣cosx∣≤1, so its reciprocal has ∣sec⁡x∣≥1|\sec x|\geq1∣secx∣≥1.

Card 1 of 23

1.7.15 Sec, cosec and cot functions (A-level only) Flashcards

  1. A Level
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  3. /1.7.15 Sec, cosec and cot functions (A-level only)

23 flashcards on OCR (MEI) A Level Maths 1.7.15 Sec, cosec and cot functions (A-level only): the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03.

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