Question
If tan A = 1 and tan B = √ 3, what is the value of cos
A . cos B - sin A . sin B?Solution
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
During his visit on 28 February 2026, Prime Minister Narendra Modi launched the nationwide Human Papillomavirus (HPV) Vaccination Programme in which cit...
Which country has decided to scrap the proposal to cut taxes for the wealthy?
Which organisation was honoured with the JSJB Award in the Best Partner Ministries/Departments category?
On which date will the Indian Navy commission INS Udaygiri and INS Himagiri together for the first time?
Olympian Ravi Dahiya becomes ____ to win silver medal in wrestling?
What is the cash prize for the Gold Award under the NAeG 2025 initiative?
Emmanuel Macron has been re-elected as the President of which Country?
Which of the following international organization has launched the Giving to Amplify Earth Action (GAEA) to help unlock the USD 3 trillion of financing ...
- Which nation is jointly conducting Exercise DUSTLIK-VI with India in April 2025?
Which of the following is a newly discovered species of Darwin wasps from India?
Relevant for Exams:
