When the angle θ is nπ where n=0,1,2,3….. i.e. the angle lies on x-axis, the value of csc θ is undefined.
What is csc θ?
csc θ is bascically cosecθ which is the reciprocal of sinθ
cosecθ= 1/sinθ
csc θ will be undefined when denominator is 0 i.e. sinθ is 0.
The value of sinθ is 0, when θ will be 0,π,2π,3π....... i.e. θ=nπ where n=0,1,2,3,.......
Therefore when the angle θ is nπ where n=0,1,2,3….. i.e. the angle lies on x-axis, the value of csc θ is undefined.
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