## anonymous one year ago Find a possible solution to the equation sin(3x+13) = cos(4x). fan and metal

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1. anonymous

good luck with that program is this a real question?

2. anonymous

i mean it cannot really be done without some sort of technology here are the answers http://www.wolframalpha.com/input/?i=sin%283x%2B13%29%3Dcos%284x%29

3. anonymous

i wasnt able to find an answer

4. zepdrix

$\Large\rm \sin(3x+13)=\color{orangered}{\cos(4x)}$Since sine and cosine are co-functions, can't we just do this? $\Large\rm \sin(3x+13)=\color{orangered}{sin\left(\frac{\pi}{2}-4x\right)}$And then,$\Large\rm 3x+13=\frac{\pi}{2}-4x$Which gives us one solution... x=-1.6327...