Class 12th Ncert|Inverse trigonometric functions| Easy to understand
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Course
Mathematics
Institution
Sixth Year / 12th Grade
Inverse trigonometric functions are the inverses of the basic trigonometric functions: sine, cosine, tangent, cotangent, secant, and cosecant. In Class 12th NCERT, these functions help us find angles when the values of the trigonometric functions are known. The main inverse trigonometric functions ...
Mathematics Notes for Class 12 Chapter 2
Inverse Trigonometric Functions
Inverse Function
If y = f(x) and x = g(y) are two functions such that f (g(y)) = y and g (f(y)) = x, then f and y are
said to be inverse of each other
i.e., g = f-1
IF y = f(x), then x = f-1(y)
Inverse Trigonometric Functions
If y = sin X-1, then x = sin-1 y, similarly for other trigonometric functions.
This is called inverse trigonometric function .
Now, y = sin-1(x), y ∈ [π / 2 , π / 2] and x ∈ [-1,1].
(i) Thus, sin-1x has infinitely many values for given x ∈ [-1, 1].
(ii) There is only one value among these values which lies in the interval [π / 2 , π / 2]. This
value is called the principal value.
Domain and Range of Inverse Trigonometric FunctionsGraphs of Inverse Trigonometric
Functions
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Properties of Inverse Trigonometric Functions
Property I
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