1.

If theta in ((-pi)/(4), (pi)/(4)) and x=log_(e )[cot((pi)/(4)+theta)] then prove that (i) cosh x= sec 2theta"" (ii) sinh x=-tan 2theta

Answer»

`TAN(2THETA)`
COT`2theta`
`-"Tan"2theta`
`-"Cot"2theta`

ANSWER :C


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