How do we get to know the exact dates from calenders?
Q. A round balloon of radius _r_ subtends an angle _a_ at the eye of the observer while the angle of elevation of its centre is _b_ . Prove that height of the centre of the balloon is _r_ sin _b_ cosec _a_/2. Please also draw the figure of the...
"Novelists in colonial India for a political cause". Explain briefly.