Trigonometry Sin(A+B), Sin(A-B), Cos(A+B), Cos(A-B) formula with example

Trigonometry Sin(A+B), Sin(A-B), Cos(A+B), Cos(A-B) formula with example - Today we share some important Basic trigonometry which is help you to understand basic concept of trigonometry.

1. Sin(A+B) = Sin A Cos B+Cos A Sin B
2. Sin(A-B) =  Sin A Cos B-Cos A Sin B
3. Cos(A+B)= Cos A Cos B - Sin A Sin B
4. Cos(A-B)= Cos A Cos B + Sin A Sin B

For example.Find the Value of Sin(45+30) ?
sol.-

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