`2/3+ (- 2)/(5)+5/6+ (-7)/(15)`

Find : b. 7 (5)/(6) + 4 (2)/(5) - 6 (2)/(15)

Verify that: (i) ((-3)/(16)xx(8)/(15))=((8)/(15)xx(-3)/(16)) (ii) (2)/(3)xx((6)/(7)xx(-4)/(15))= ((2)/(3)xx(6)/(7))xx(-14)/(15) (iii) (5)/(6)xx((-4)/(5)+(-7)/(10))=((5)/(6)xx(-4)/(5))+((5)/(6)xx(-7)/(10))

The value of 3(1)/(5) - [2(1)/(2) - ((5)/(6) - ((2)/(5) + (3)/(10) - (4)/(15))] is :

The value of 6((1)/(5)) - [4((1)/(2)) - {""((1)/(6)) - (""((3)/(5)) + ""((3)/(10)) - ""((7)/(15)))}] is

" (iii) ((-2)/(5)+(4)/(7))+((-2)/(5)) ( iv )(3)/(4)+(7)/(6)+((-5)/(4))+(1)/(2)

The average of 4(3/5) , 2(2/3) , 6(8/9) , 7(7/15) , 3(5/9) is:

The projections of a vector on the three coordinate axis are 6,3,2 respectively.The direction cosines of the vector are (A)6,-3,2(B)(6)/(5),(-3)/(5),(2)/(5)(C)(6)/(7),(6)/(7),(2)/(7) (D) (-6)/(7),(-3)/(7),(2)/(7)

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