Saturday, February 27, 2010

If x=5 and tan胃=5 then what is y=? and r=?, please help me, I need a clear solution..thanks!?

note: the answer is not y鈮?5 and r鈮?5.5If x=5 and tan胃=5 then what is y=? and r=?, please help me, I need a clear solution..thanks!?
5 = tan胃 = y/x = y/5





y = 25





and





r = 鈭?x^2+y^2)





= 鈭?25 + 625)





= 鈭?50





= 5鈭?6 , exactly, or





鈮?25.49509757If x=5 and tan胃=5 then what is y=? and r=?, please help me, I need a clear solution..thanks!?
if you mean in circular coordination so we can solve this problem:


x = 5 , tan 胃 = 5


we known tan 胃 = sin 胃 / cos 胃


sin 胃 = y / r %26amp; cos 胃 = x / r


thus tan 胃 = 5 = y / x so y = 25


and r = (x^2 + y^2)^0.5 = 25.5
y = sqrt(5/tan(theta))





r = y^2/e^y/E








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