Prove that (sin 3x+sin 5x+sin 7x+sin 9x)/(cos 9x+cos 7x+cos 5x+cos 3x) = tan5x
A point d is taken on the side bc of triangle abcsuch that bd is equal 2dc prove that area of triangle abd is equal to the 2area of triangle adc
The taxi fare in a city in as follows for the first km RS 20 subsequent distance RS 6 per km taking the total fare is y and write a linear equation and find its area