`(-8)/15-(6/21)=?`

Do this : (-8)/15+((-7)/20)

Simplify (8)/(15) +(3)/(15)

cos""(2pi)/(15) cos ""(4pi)/(15)""cos(8pi)/(15) cos""(16pi)/(15)=

""^(15)C_(8)+""^(15)C_(9)-""^(15)C_(6)-""^(15)C_(7) is equal to

If A+B=[(2,3,1),(6,-1,5)],A-B=[(2,1,-1),(0,-1,3)] then B=

Verify the: (-21)xx[(-4)+(-6)]=[(-21)xx(-4)]+[(-21)xx(-6)]

Verify: (-21)times[(-4)+(-6)=[(-21)times(-4)]+[(-21)times(-6)]

Verify: (-21)times[(-4)+(-6)=[(-21)times(-4)]+[(-21)times(-6)]

The equation of the circle passing through (1,2) and the points of intersection of the circles x^2+y^2-8x-6y+21=0 and x^2+y^2-2x-15=0 is

Find the equation of the circle passing through the points of intersection of the circles x^(2)+y^(2)-8x-6y-21=0 x^(2)+y^(2)-2x-15=0and(1,2)