# Cot-Tan formula

The law of cot or Tangent which is also called as cot-tangent formula or cot-tangent rule is the ratio of the cote of the angle to the cos of the angle in tangent formula

Tan Theta = Opposite / Adjacent

Cot Theta = Base / Perpendicular

## cot – Tan x formula

The Tan Θ is the ratio of the Opposite side to the Adjacent, where (Θ) is one of the acute angles.

 Tan Theta = Opposite/Adjacent Cot Theta = Perpendicular / Hypotenuse

## Tan alpha Questions

Out of other 6 trigonometric formulas, let’s have a look at the practice question of tan theta formula.

Question 1: If Sec x = 4/7, find tan x?

Solution: As Sec x = 1/cos x

4/7 = 1/ cos x

Cos x = 4/7

Tan2 x = sec2x – 1

= (4/7)2 – 1

= 16/49 – 1

= – 25/49

= – 5/7

To practice more Trigonometric questions and understand the trigonometric concepts better, register on BYJU’S.

#### Practise This Question

If two bodies were rubbed against each other and one aquired a -5mC charge, what will be the charge on the other body?