The measures of the four angles of a quadrilateral are in the ratio 1:2:4:5. What is the measure of the biggest angle?

If x + y = 12 and x2 + y2 = 94, then xy is 

What is the value of sinAtanA/(1 - cosA)?

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 29160, and Rs 31492.8 respectively, what is the rate of interest?

Among three numbers, the first is twice the second and thrice the third, If the average of three numbers is 517, then what is the difference between the first and the third number?

To travel 672 km, an Express train takes 14 hours more than Rajdhani. If however, the speed of the Express train is doubled, it takes 8 hours less than Rajdhani. The speed of Rajdhani is

What is the equation of the line whose y-intercept is -3 and makes an angle of 45° with the positive x-axis?

If √(1 - sin2A) = x, then the value of x is