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Solve for xSolve for x in this equation please :) It's an equation from physics and I...
Solve for x
Solve for x in this equation please :) It's an equation from physics and I need to have x as a function of y. v, g and h are all constants. I usually can do this, but not with inverse trig... I tried to make it look as least confusing as possible...
y=[v*cos(x)/g] * [v*sin(x)+sqrt( (v^2*sin(x)^2) + (2*g*h) )]
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Use the maximum, minimum and zero values of sine and cosine functions to solve the equation.
You notice that if cos x=0, the factor `(v*cos x)/(g) = 0` . This 0 factor cancels out the entire product. The cosine is zero if sin x = `+-1` (`x=pi/2 + n*pi/2` ).
If cos x = -1 => sin x = 0. Put these values in your equation:
`y = -(v/g)*[v*0 +sqrt( (v^2*0^2) + (2*g*h) )]`
`y = -(v*sqrt(2gh))/g`
If `cos x = 1 =gt sin x = 0 =gt y = -(v*sqrt(2gh))/g`
ANSWER: If sin x is maximal or minimal, the equation cancels out, therefore the roots of the equation are x=`pi/2 + n*pi/2` , n=1,2,...
Posted by sciencesolve on November 25, 2011 at 11:36 PM (Answer #1)
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