Formula to transform the product into sum or difference The sine formula of the sum and difference of two angles is written as follows: Add both the expression as follows: Then, subtract expression (2) from expression (1) as follows: Similarly consider the cosine formula of the sum and difference of two angles is written as […]

# Tag: cosine formula

## TRANSFORMATION FORMULAE

Formula to transform the product into sum or difference The sine formula of the sum and difference of two angles is written as follows: Add both the expression as follows: Then, subtract expression (2) from expression (1) as follows: Similarly consider the cosine formula of the sum and difference of two angles is […]