# NCERT Class 12-Mathematics: Chapter –2 Inverse Trigonometric Function Part 10

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**Question 9:**

If ,where is any integer

**Answer:**

Given that:

**Question 10:**

Show that

**Answer:**

LHS

Now, RHS

Hence, LHS RHS

**Question 11:**

Solve the following equation

**Answer:**

Given that:

Squaring both sides

Hence,