# NCERT Class 12-Mathematics: Chapter – 2 Inverse Trigonometric Function Part 9 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Question 5**:

Find the value of

**Answer**:

We have:

[As we know that the range of the principal value branch of is ]

Hence, the value of is .

**Question 6**:

Show that

**Answer**:

LHS

**Question 7**:

Find the real solution of the equation

**Answer**:

Given that

**Question 8**:

Find the value of the expression

**Answer**:

Given that