2.Find the sum: (a)
`2frac(5)(6)+3frac(3)(8)`=

Find the sum: 4(3)/(5)+2(7)/(8)

If tan^-1 x=y then : (a) -1lt y lt 1 (b) frac(-pi)(2)le y le frac(pi)(2) (c) frac(-pi)(2)lt y lt frac(pi)(2) (d) y in {frac(-pi)(2),frac(pi)(2)}

Evaluate the sum: 2/(9)+3(2)/(5)

The value of (sin frac(pi)(8) + i cos frac(pi)(8))^(8)/((sin frac(pi)(8) - i cos frac(pi)(8))^(8)) is :

Draw hops on a number line to show the addition statement and find the sum : {:(a.,3 + (-7),b.,(-4) + 6),(c.,3 + 5,d.,(-2) + (-5)):}

Prove that : Find the sum of the infinite series 1+(2)/(3).(1)/(2)+(2.5)/(3.6)((1)/(2))^(2)+(2.5.8)/(3.6.9)((1)/(2))^(3)+......oo

If P = [[cos frac(pi)(6), sin frac(pi)(6) ],[-sinfrac(pi)(6),cosfrac(pi)(6)]], A = [[1,1],[0,1]] then P+ A

Find the sum:  (i) 5/8+3/(10) (ii) 4 3/4+9 2/5

Re- arrange suitably and find the sum: 5/3+(11)/2+\ (-9)/4+\ (-8)/3+\ (-7)/2

Find the sum:  (i) 5/6+3+3/4 (ii) 2 3/5+4 7/(10)+2 4/(15)