`((-2)/5)^7-:((-2)/5)^5` is equal to `4/(25)` (b) `(-4)/(25)` (c) `((-2)/5)^(12)` (d) `(25)/4`

((-2)/5)^7-:((-2)/5)^5 is equal to (a) 4/(25) (b) (-4)/(25) (c) ((-2)/5)^(12) (d) (25)/4

sin{2\ cos^(-1)(-3/5)} is equal to 6//25 (b) 24//25 (c) 4//5 (d) -24//25

2 3/5-:5/7=\ (a) (13)/7 (b) (13)/(25) (c) (91)/(25) (d) (25)/(91)

(1)/(0.04) is equal to (1)/(40) (b) (2)/(5)(c)2.5(d)25

(2/3)^(-5)x\ (5/7)^(-5) is equal to (2/3x5/7)^(-10) (b) (2/3x5/7)^(-5) (c) (2/3x5/7)^(25) (d) (2/3x5/7)^(-25)

(2/3)^(-5)x\ (5/7)^(-5) is equal to (a) (2/3x5/7)^(-10) (b) (2/3x5/7)^(-5) (c) (2/3x5/7)^(25) (d) (2/3x5/7)^(-25)

sin{2\ cos^(-1)(-3/5)} is equal to (a) 6//25 (b) 24//25 (c) 4//5 (d) -24//25

2 3/5-:5/7=\ (13)/7 (b) (13)/(25) (91)/(25) (d) (25)/(91)

If A = [(4,5),(2,5)] , then |(2A)^(-1)| =....

If sectheta=frac(5)(4) , then frac(tantheta)(1+tan^2theta) is equal to (A) frac(9)(25) (B) frac(12)(25) (C) frac(3)(4) (D) frac(1)(25)