Questions

If cos(A-B) - cos(A+B) = x, then the value of x is

Who is the author of "It's All in the Planets"?

Which of the following is the name of a medieval Indian book on mathematics?

Which of the following is used for disinfecting drinking water?

In which of the following tissues are the cells living, elongated and irregularly thickened at the corners?

15% of an alloy was silver. If in a quantity of alloy there was 51 g of silver, what was the quantity of the other elements in the alloy?

The oldest oil field in Asia is located in

In the following passage some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four
alternatives.

Morality is _____ with ethics and symbolises the doctrine of actions right or wrong. Politics is the _____ of expediency and need not always be _____. If something is wrong and _____ expedient, it cannot be _____.

If something is wrong and _____ expedient,