NOEL

Suppose tan theta=15pi/18 is less than theta 3pi/2 , what are the other trigonometric functions?

experiments show that radium disintegrates at a rate proportional to the amount of radium present at the moment . if half life is 1590 years what percentage will disappear in one year?

On a map with a scale of 1:100m, what is the actual area of a land in hectares if it is 180 sq.m on the map?