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I was trying to do a^2=25^2+30^2-2(25)(30)cos77
But the calculator won't let me input the equation into the system or it doesn't want to solve it.
HELP !
 Mar 1, 2012

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 #1
avatar+3144 
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KBK'Forlifee:

I was trying to do a^2=25^2+30^2-2(25)(30)cos77
But the calculator won't let me input the equation into the system or it doesn't want to solve it.
HELP !



[input]25^2+30^2-2(25)(30)cos77[/input]

[input]a^2=1187.57341848421[/input]
 Mar 1, 2012

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