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csc^2(x)+cot(x)=7

explanation please
Guest May 10, 2012
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Given: csc^2(x) + cot(x) = 7

csc^2(x) = cot^2(x) + 1


cot^2(x) + 1 + cot(x) = 7
cot^2(x) + cot(x) - 6 = 0

Let cot(x) = a
a^2 + a - 6 = 0
(a + 3)(a - 2) = 0
a = -3
a = 2


but a = cot(x)

cot(x) = -3
x = 341.57deg


cot(x) = 2
x = 26.57deg



Steub
Guest May 11, 2012

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