Math Problems: Help please. 1. Simplify `sin(pi/4 + 0) + sin(pi/4 - 0)`

Expert Answers
lemjay eNotes educator| Certified Educator


First, simplify the expression inside the parenthesis.

`= sin(pi/4) + sin(pi/4)`

Then, combine like terms.


And, refer to unit circle chart to get the exact value of sine when the angle is pi/4.



Cancel common factor to simplify further.


Hence,  `sin(pi/4+0)+sin(pi/4-0)=sqrt2` .