Solve-
`(2/13)^(4/3)div(2/13)^(5/3)`

Find (13)/(15) div 8 (2)/(3)

Show that the three lines with direction cosines (12)/(13),(-3)/(13),(-4)/(13),4/(13),(12)/(13),3/(13);3/(13),(-4)/(13),(12)/(13) are mutually perpendicular.

Show that the three lines with direction cosines (12)/(13),(-3)/(13),(-4)/(13);4/(13);(12)/(13),3/(13);3/(13),(-4)/(13),(12)/(13) are mutually perpendicular.

Solve : 4/(13)+2/(13)+1/(13)

Solve for x.(x)/(5)+(2)/(5)=(13)/(5)

4/3 div ?=-5/2

Divide: ((-4))/(13)div((-16))/(39)

2cos(pi/13)cos(9pi/13)+cos(3pi/13)+cos(5pi/13)=0

4/13+9/13+2/13=-/13

solve (3x)/(2)-(5y)/(3) = -2 (x)/(3)+(y)/(2) = 13/6