Question
If 7sin² ϕ + 3cos² ϕ = 4, then find the
value of ϕ ?Solution
7sin² ϕ + 3cos² ϕ = 4sin² ϕ + 3sin² ϕ +3cos² ϕ = 4 4sin² ϕ + 3(sin2 ϕ + cos2 ϕ) = 4 4sin²ϕ + 3 (1) = 4 4sin²ϕ + 4 - 3 = 1 4sin²ϕ = 1 sin²ϕ = 1/4 sin ϕ = 1/2 sin30° = 1/2 Hence, ϕ = 30
Who founded the city of Madras (now Chennai)?
Which of the given statements is/are the after effects of the Quit India movement?
1. After the Quit India Movement, the British realized that...
With reference to Mughal Kingdom after Aurangzeb, consider the following:
1. Bahadur Shah I (1707-1712) adopted a confrontationist policy towar...
Which event marked the beginning of the Non-Cooperation Movement in India.
Who was the Governor-General of India during the Sepoy Mutiny of 1857?
Which emperor wrote the Sanskrit play 'Nagananda'?
Which of the following newspapers/journals were published by Bal Gangadhar Tilak?
1. The Orion
2. Gita Rahasya
3. Kesari
Which regiment did Mangal Pandey, a key figure in sparking the Indian Rebellion of 1857, serve in?
Who amongst the following established a secret organization of the revolutionaries known as Mitra Mela?
Which of the following statements regarding Indian Factory Act, 1891 is/are correct?
1. It increased the minimum and maximum age limit for chi...
Relevant for Exams:
