" ail "[((-4)/(7))+(1)/(4)]+((7)/(-16))=((-4)/(7))+[(1)/(4)+((7)/(-16))]

((4)/(7))^(2)times((4)/(7))^(2)

Show- [(-4/7)+1/4]+(-7/16)=(-4/7)+[1/4+(-7/16)]

(1)/(2)+(3)/(2).(1)/(4)+(5)/(3).(1)/(8)+(7)/(4).(1)/(16)+....=

((1)/(1xx4)+(1)/(4xx7)+(1)/(7xx10)+(1)/(10xx13)+(1)/(13xx16))=?

1-(3)/(16)+(1.4)/(1.2)((3)/(16))^2- (1.4.7)/(1.2.3)((3)/(16))^3 + …..=

The value of tan[cos^(-1)((4)/(5))+tan^(-1)((2)/(3))] is (6)/(17) (b) (7)/(16) (c) (16)/(7) (d) none of these

Divide :(-7)/(8)by(-21)/(16) (ii) (7)/(-4)by(63)/(64) (iii) 0 by (-7)/(5)

If two parallel chords of a circle,having diameter 4 units,lie on the opposite sides of the centreand subtend angles cos^(-1)((1)/(7)) and sec^(-1)(7) at the centre respectively,then the distance betweenthese chords,is: (a) (4)/(sqrt(7)) (b) (8)/(sqrt(7)) (c) (8)/(7) (d) (16)/(7)