If sin θ = x

Then putting sin on the right side

θ = sin
^{
-1
}
x

sin
^{
-1
}
x = θ

So, inverse of sin is an angle.

Similarly, inverse of all the trigonometry function is angle.

Note: Here angle is measured in radians, not degrees.

So, we have

sin
^{
-1
}
x

cos
^{
-1
}
x

tan
^{
-1
}
x

cosec
^{
-1
}
x

sec
^{
-1
}
x

tan
^{
-1
}
x

**
Let’s take an example
**

We know that

sin 30° = ½

*
Writing angle in radians
*

sin π/6 = ½

π/6 = sin
^{
-1
}
½

sin
^{
-1
}
½ = π/6

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