February 25, 2017

Homework Help: Trigo!

Posted by help! on Saturday, September 19, 2009 at 2:21am.

Ok, i did this maths trigo question, that says sinx-cos=2/3. I squared it on both sides to get sin2x=5/9 and did the sum. In the end i got two solutions, 16.9 and 73.1. However, when i substituted the answers back into the equation, only one of the 2 answers was correct! The other one didn't work out! Why is this so? I'm pretty sure both answers are correct, so what's going on? Please help!

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions