`1- 49/50`

Convert the following to per cents: 49/50

The value of cos[2tan^(-1)(-7)] is :a) 49/50 b) -49/50 c) 24/25 d) -24/25

If x^(51)+51 is divided by x+1 , the remainder is (a)0 (b) 1 (c) 49 (d) 50

If the symbol [x] denotes the greatest integer less than or equal to x, then the value of [(1)/(4)]+[(1)/(4)+(1)/(50)]+[(1)/(4)+(2)/(50)]+backslash+backslash[(1)/(4)+(49)/(50)] is 0(b)9(c)12(d)49

Prove statement "cos"^(-1) 12/13 +2"cos"^(-1) sqrt(64/65) +"cos"^(-1) sqrt(49/50) ="cos"^(-1)1/sqrt2

The refractive index (n) of glass is found to have the values 1.49,1.50,1.52,1.54 and 1.48. Calculate (i) the mean value of refractive index, (ii) absolute error in each measurement, (iii) mean absolute error, (iv) fractional error and (v) percentage error