Edexcel A Level Maths: Pure:復(fù)習(xí)筆記5.5.1 Reciprocal Trig Functions - Definitions
Reciprocal Trig Functions - Definitions
What are the reciprocal trigonometric functions?
- There are three reciprocal trig functions corresponding to the three regular trig functions
- Cotangent can also be written in terms of sine and cosine
Exam Tip
- To solve equations with the reciprocal trig functions, convert them into the regular trig functions and solve in the usual way.
- Don't forget that both?tan?and?cot?can be written in terms of?sin?and?cos?(see the Worked Example below).
- You will sometimes see?csc?instead of?cosec?for cosecant.
Worked Example
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