Definitions of Reciprocal Trigonometric Functions (Cambridge (CIE) A Level Maths): Revision Note
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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
Examiner Tips and Tricks
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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