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(3)/(7)+(-(5)/(14))+(-(11)/(14))...

(3)/(7)+(-(5)/(14))+(-(11)/(14))

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4(3)/(7)+2(5)/(14)

Using appropriate properties find : (2)/(5) xx ((-3)/(7)) - (1)/(6) xx (3)/(2) + (1)/(14) xx (2)/(5) = (2)/(5) xx ((-3)/(7)) + (1)/(14) xx (2)/(5) - (1)/(cancel6) xx (cancel 3)/(2) = (2)/(5) xx ((-3)/(7) + (1)/(14) ) - (1)/(4) = (2)/(5) xx ((-6+1)/(14))- (1)/(4) = (cancel 2)/(cancel 5) xx (-cancel 5)/(cancel14) - (1)/(4) = (-1)/(7) - (1)/(4) (- 4 - 7)/(28) = (-11)/(28)

If (m)/(n)=(4)/(3) and (r)/(t)=(9)/(14), the value of (3mr-nt)/(4nt-7mr) is 5(1)/(2)(b)-(11)/(14)(c)-1(1)/(4) (d) (11)/(14)

12(1)/(3)+10(5)/(6)-7(2)/(3)-1(4)/(7)=?( a) 11(13)/(14) (b) 13(11)/(14)(c)13(13)/(14) (d) 14(11)/(13) (e) None of these

Evaluate : (i) (3)/(4)-(4)/(5) (ii) -3-(4)/(7) (iii) (7)/(24)-(19)/(36) (iv) (14)/(15)-(13)/(20) (v) (4)/(9)-(2)/(-3) (vi) (7)/(11)- (-4)/(-11) (vii) (-5)/(14) -(-2)/(7) (viii) (-5)/(-8)-(-3)/(4)

The value of sin(pi/(14))sin((3pi)/14)sin((5pi)/(14))sin((7pi)/(14))sin((9pi)/(14))sin((11pi)/(14))sin((13pi)/(14)) is equal to___________

Prove that: sin((pi)/(14))sin((3 pi)/(14))sin((5 pi)/(14))sin((7 pi)/(14))sin((9 pi)/(14))sin((11 pi)/(14))sin((13 pi)/(14))=(1)/(64)

(3)/(7) div (9)/(14)xx(6)/(11)=?