# Thread: Sin Squared (2003)

1. ## Sin Squared (2003)

Is sin^2(a) the same as (sin(a))^2

where ^2 denotes squared. I have an equation I am trying to plot that is sin^2(a) and am unsure how to notate it, is it simply =POWER(SIN(A2),2) <img src=/S/shrug.gif border=0 alt=shrug width=39 height=15>

2. ## Re: Sin Squared (2003)

Yes, mathematicians use sinē x as a shorthand notation of the square of sin x

The Excel notation would be =(SIN(A2))^2 or =POWER(SIN(A2),2)

Keep in mind that the trig functions in Excel take radians as argument. If A2 is in degrees, you have to multiply with PI()/180 to convert to radians: =(SIN(A2*PI()/180))^2

3. ## Re: Sin Squared (2003)

Cheers Hans, I have the radians conversion already sorted in column A <img src=/S/grin.gif border=0 alt=grin width=15 height=15>

I have a tendency to use =(ROW()*PI())/180 and copy down when using circular functions, same thing just another method <img src=/S/evilgrin.gif border=0 alt=evilgrin width=15 height=15>

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