`[78-{75-(76-bar(72-75))}]`

tan75-cot75=

The square root of (0.75)^(3)/(1-(0.75))+(0.75+(0.75)^(2)+1) is-

(sin^(8)75^(@)-cos^(8)75^(@))=

75-: _____=-75

Solve: /_\ = |[71,74,77],[72,75,78],[73,76,79]|

|[77,78,79],[76,75,74],[75,74,73]|=

Pulse rate (per miute) of 30 persons were recorded as 61,76,72,73,71,66,78,73,68,81,78,63,72,75,80,68,75,62,71,81,73,60,79,72,73,74,71,64,76 and71. Construct a frequency table using class-invervals of equal width,one class interval being (60-65).

The sum of all the prime numbers from 1 to 20 is 75 (b) 76 (c) 77 (d) 78