**Trigonometric Ratios CBSE NCERT Solutions Chapter 8 Exercise 8.1 Question 8**

8. If **3 cot A = 4**, check whether (1-) / (1+) = or not.

**Solution:**

cot A = **(Side Adjacent to Angle A) / (Side Opposite to Angle A)** =

Let AB = 4k and BC = 3k as we are given that

Using** Pythagoras Theorem** on , we get

cot A =

Because, tan A =

cos A = (Side Adjacent to Angle A) / (Hypotenuse) =

sin A = (Side Opposite to Angle A) / (Hypotenuse) =

(1-) / (1+) = ** (1)**

**(2)**

From **(1) **and** (2)**, we can say that

(1-) / (1+) =