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
Which pest's larvae, affecting Sorghum crops, cut the growing points and lead to dead-hearts in the plant?
The larval stage is predatory whereas the adults are pollinator in case of
‘Allahabad Safeda’ is the variety of :
The nutrient removed in maximum quantity by paddy crop is:
Microbodies associated with mitochondria and chloroplasts containing the enzyme glycolate oxidase are known as
Fanging is related to
Which of the following is used to show locally the worth or value of a recommended partice?
Separation of rice from the paddy is calling hulling. The hulling % of rice is _____
…………………….. involves in the accreditation of Certification Bodies, standards for organic production, promotion of organic farming and mar...
Match List I with List II
Choose the correct ans...
