MCQ
$\sec ({\rm{cose}}{{\rm{c}}^{ - 1}}x)$ is equal to
- ✓${\rm{cosec}}({\sec ^{ - 1}}x)$
- B$\cot x$
- C$\pi $
- DNone of these
$ = \frac{{|x|}}{{\sqrt {{x^2} - 1} }}$, for $|x|\, > \,1$.
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$\frac{\pi^4}{2}$
$\frac{\pi^4}{4}$
$0$
For any event $H$, if $H ^{ C }$ denotes its complement, then which of the following statements is(are) $TRUE$?
$(A)$ $P \left( E \cap F \cap G ^{ C }\right) \leq \frac{1}{40}$
$(B)$ $P\left(E^C \cap F \cap G\right) \leq \frac{1}{15}$
$(C)$ $P ($E$\cup F \cup G ) \leq \frac{13}{24}$
$(D)$ $P \left( E ^{ C } \cap F ^{ C } \cap G ^{ C }\right) \leq \frac{5}{12}$
If a binary operation * is defined on the set Z of integers as a * b = 3a − b, then the value of (2 * 3) * 4 is: