i can't understand the logic behind writing trigonometric ratio like this

Asked by  | 18th Jul, 2011, 10:23: AM

Expert Answer:

If x=n,then sinx=0 (since sinn=0)
so,at x=n the value of cosecx= become not defined .
similarly ,all other cases can be explained.

Answered by  | 18th Jul, 2011, 09:13: AM

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