sin(x)+cos(x)=0 且0小于等于x小于等于π 求x

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sin(x)+cos(x)=0 且0小于等于x小于等于π 求x
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sin(x)+cos(x)=0 且0小于等于x小于等于π 求x
sin(x)+cos(x)=0 且0小于等于x小于等于π 求x

sin(x)+cos(x)=0 且0小于等于x小于等于π 求x
∵sin(x)+cos(x)=0
1+sin(2x)=0
sin(2x)=-1
∵π≥x≥0
2π≥2x≥0
∴2x=3π/2
x=3π/4

sin(x)+cos(x)=0
=>1+(1/2)sin2x=0
=>sin2x=-1/2
=>2x=π+π/6=7π/6 ,2x=2π-π/6=11π/6
=>x=7π/12,x=11π/12不还意思能不能再教我一道 tanx=37/200 求x1.sin(x)+cos(x)=0 =>1+sin2x=0 =>sin2x=-1 =>2x=3π/2 => ...

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sin(x)+cos(x)=0
=>1+(1/2)sin2x=0
=>sin2x=-1/2
=>2x=π+π/6=7π/6 ,2x=2π-π/6=11π/6
=>x=7π/12,x=11π/12

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sinx+cosx=0,0∴tanx=-1,
x=3π/4.不还意思能不能再教我一道 tanx=37/200 求x37,÷200,=,2ndf,tan-1, x=10.48121814°+k*180°,k∈Z.可是这是道选择题 给的选项只有 a) tan-1 (37⁄200) b) tan (37⁄200) c) sin-1 (37...

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sinx+cosx=0,0∴tanx=-1,
x=3π/4.

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