1.

If tan alpha = (P)/(q) "where" alpha = 6 beta, alpha being an acute angle then (1)/(2) ["p cosec" 2 beta - q sec 2 beta] is equal to

Answer»

`sqrt(p^(2) + Q^(2))`
`sqrt(p^(2) - q^(2))`
`sqrt(2P^(2) + q^(2))`
`2 sqrt(p^(2) + q^(2))`

Answer :A


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