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a. pi/2, 3pi/2
b. 0, pi
c. pi/4, 3pi/4, 5pi/4, 7pi/4
d. pi/2
e.none of these

2007-03-19 20:15:55 · 1 answers · asked by diente 1 in Science & Mathematics Mathematics

1 answers

csc^2 x - (cos^4 x + 2 cos^2 x sin^2 x + sin^4 x) = 0
csc^2 x - (cos^2 x + sin^2 x)^2 = 0
csc^2 x - 1 = 0
csc^2 x = 1
sin^2 x = 1
sin x = ±1
x = π/2, 3π/2

2007-03-19 20:38:23 · answer #1 · answered by Helmut 7 · 0 0

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