Question
If A, B and C are angles of triangle, then sin2A + sin2B
+ sin2C– 2cosA cosB cosCSolution
Let A = B = 45º, C = 90º
then, sin2A, + sin2B + sin2C – 2 cosA cosB cosC
= (1/√2) 2 + ( 1/√2) 2 + 1 – 0 (as cosC = 0)
= 1/2 + 1/2 + 1 = 2
In which year was the Bureau of Energy Efficiency (BEE) established?
The ‘Ease of Doing Business Index’ is a ranking system established by which organisation?
Who is likely to inaugurate the 46th session of the UNESCO World Heritage Committee?
As per the ULI update, how many total lenders have been onboarded on the Unified Lending Interface platform?
Who among the following will be attending the Annual Meetings of the International Monetary Fund (IMF) and the World Bank, the G20 Finance Ministers an...
Which of the following venture capital firm has announced to launch a Rs 100-crore fund and plans to invest in 30 startups in the next 18 months?
Which of the following information is/are TRUE with respect to the changes made by the Reserve Bank of India in relation to the Small Finance Banks ?
What will the proceeds from SBI's ₹10,000 crore infrastructure bond issue be used for?
Who has been elected as the caretaker Prime Minister of Pakistan?
Which policy was announced as India’s first to enable recovery of critical minerals from mine tailings and dumps?
Relevant for Exams:
