1.

The value of the expression 1+"cosec"(pi)/(4)+"cosec"(pi)/(8)+"cosec"(pi)/(16) is equal to

Answer»

`cot.(pi)/(8)`
`cot.(pi)/(16)`
`cot.(pi)/(32)`
`"COSEC"^(2).(pi)/(16)`

Answer :C


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