if tan^-1x +tan^-1y=pi/4 then write the value of x+y+xy
Question
Places A and B are 80 km apart from each other on a highway. A car starts from A and
another from B at the same time. If they move in same direction they meet in 8 hours and if
they move towards each other they meet in 1 hour 20 minutes. Find the speed of cars.
Maths
Dec. 9, 2018, 6:07 p.m.
Answer
Circle
Q.Find the equation of circle which passes through the centre of the citcle x2 y2 8x 10y-7=0 and is concentric with the circle 2x2 2y2 8x-12y-9=0
Q.Find the equation of circle which passes through the centre of the citcle x2 y2 8x 10y-7=0 and is concentric with the circle 2x2 2y2 8x-12y-9=0
14. Find the area of the triangle formed by joining the mid-points of the sides of the triangle whose vertices are (0, –1), (2, 1) and (0, 3). Find the ratio of this area to the area of the given triangle.
A box contains contains card numbered 11to123. A card is random from the box. Find the probability that the number on the drawn card is 1a square number 2a multiple of7