Prove
sinA / sec A tanA-1 cos A/ cosec A cot A-1=1
A gulab jamun contains sugar syrup up to about 30% of its volume find approximately how much syrup would be found in 45 gulab jamun each shaped like a cylinder with two hemispherical ends with length 5 cm and diameter 2.8 cm
If A and B are two sets such that A is sub set to B then what is A union B