If tan A = 1 and tan B = √ 3, what is the value of cos A . cos B - sin A . sin B?
Given, tan A = 1 ⇒ A = 45° Also given, tan B = √ 3 ⇒ B = 60° ∴ cos A . cos B - sin A . sin B = cos 45° . cos 60° - sin 45° . sin 60° = 1/ √ 2 * 1/2 - 1/ √ 2 . √ 3/2 = (1 - √ 3)/2 √ 2
Genes located on sex chromosomes and the associate linkage of such genes is termed as sex linkage . An example of sex linkage is
Which of the following is popularly known as queen of vegetables?
Poor man’s meat is:
International year of soil is:
Which of the following statement is/are true about herbicide resistance?
Which of the following symptoms are caused by Rice stem borer?
The standard plate count is not applicable to:
Hollow heart is a disorder of
BIS certification for drinking water is a:
Which one of the following element is not essential for plant growth is: