solve cosx + sinx=0 for x?

2 ⤊

2007-10-22 02:00:35 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

dividing by cos x you get tan x= -1 so x= -pi/4 +k*pi k any integer

2007-10-22 02:04:07 · answer #1 · answered by santmann2002 7 · 2⤊ 0⤋

cosx +sinx =root 2 *cos (x-pie/4)
so you have
cos (x-pie\4) = 0
x-pie4 = pie/2 +pieK
x = pie/4 + pieK

2007-10-22 09:23:32 · answer #2 · answered by Anonymous · 0⤊ 0⤋

for X=(180-x)

2007-10-22 09:05:24 · answer #3 · answered by reci 2 · 0⤊ 0⤋