If `cosec A +cotA= 5/2,` then `tan A` is (A) `4/9` (B) `3/5` (C) `15/16` (D) `20/21`

If csc theta+cot theta=(11)/(2), then tan theta=(21)/(22) (b) (15)/(16)(c)(44)/(117) (d) (117)/(44)

If cos theta = 4//5 , " then " (sec theta + cosec theta) = A. 7/5 B. 15/12 C. 35/12 D. 12/5

If a+b=5 and 3a+2b=20, then (3a+b) will be: (a)10 (b) 15 (c) 20 (d) 25

If sin x = (4)/(5) , then ("Tan x")/("Cot x") = ? A. (13)/(9) B. (3)/(4) C. (9)/(16) D. (16)/(9)

If a:b=4:5 and b:c=2:3, then a:c4:3 (b) 8:158:9 (d) 5:3

The additive inverse of 5/9 is: (a) 9/5 (b) 1/2 (c) 2/3 (d) (-5)/9

let 2..^(20)C_(0)+5.^(20)C_(1)+8.^(20)C_(2)+?.+62.^(20)C_(20) . Then sum of this series is (A) 16.2^(22) (B) 8.2^(21) (C) 8.2^(21) (D) 16.2^(21)

If 60% of A=3/4of B , t h e n A : B is 4:5 b. 5:4 c. 9: 20 d. 20 :9

If a:b=2:5, then (3a+2b)/(4a+b)=(16)/(13)( b) (13)/(16)(25)/(22)(d)(20)/(21)

1, 4, 9, 16, 20, 36, 49 (a) 1 (b) 9 (c) 20 (d) 49