Sb Sangpi
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 May9 revised How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. deleted 80 characters in body May9 accepted How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. May9 comment How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. sorry. You are right.It is totally different! thx May9 comment How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. yea.when I read your answer, I understand it but compare to the answer graph.It make me confuse, the answer its the graph. thx@Arturo Magidin May9 comment How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. thx for that! Does your answer look the same as my graph. $y=3sin(2\theta)$ its not in the graph. thx May9 revised How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. added 105 characters in body May9 comment How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. sorry for that, intercepts for the graph. thx! May9 revised How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. added 38 characters in body May9 accepted List the $x$-axis intercepts for this trigonometric function May9 comment How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. yea, but can you please show me the working out. Sorry I'll be able to work out other questions as well. thx so much May9 comment How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. yea, exactly. Sorry for my lucky of maths. May9 comment How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. I think, it is almost the same? or totally different? May9 asked How to sketch $y=2\cos\,2x+3\sin\,2x$ , $x$ for $[-\pi,\pi]$. May8 comment List the $x$-axis intercepts for this trigonometric function yea! i think $cosx$=$\frac{\sqrt{2}}{\sqrt{2}}$ and its show in the unit cirle $\frac{7\pi}{4}$ May8 revised List the $x$-axis intercepts for this trigonometric function edited tags May8 asked List the $x$-axis intercepts for this trigonometric function May2 accepted Calculate all the values of $x$ between $0$ and $2\pi$, without using calculator. May2 comment Calculate all the values of $x$ between $0$ and $2\pi$, without using calculator. the answer is $\frac{\pi}{8}$ but I got $\frac{\pi}{4}$ May2 revised Calculate all the values of $x$ between $0$ and $2\pi$, without using calculator. added 2 characters in body May2 asked Calculate all the values of $x$ between $0$ and $2\pi$, without using calculator.