Question

how to apply componendo and dividendo In trigonometry give an example ​

Answer 1

Answer:

Step-by-step explanation:

If a/b = c/d , then (a+b) / (a-b) = (c+d) / (c-d).

Let me give you proof for the above statement.

Add 1 to both sides of the equation i.e., a/b + 1 = c/d + 1

(a+b) / b = (c+d) / d                      ….i)

Now, Subtract 1 from both sides of the equation i.e., a/b - 1 = c/d - 1

(a-b) / b = (c-d) / d                        ….ii)

Dividing eq. i) by ii). We get,

(a+b) / (a-b) = (c+d) / (c-d)

We use componendo and dividendo just to speed up the calculation part of the mathematics.