दो रेखाओं की दिक्-कोज्याएँ (direction cosines) संबंधों l + m - n = 0 और lm - 2mn + nl = 0 द्वारा जुड़ी हुई हैं। यदि इन रेखाओं के बीच का न्यून कोण θ है, तो cos θ =

The arrival of which commission in India triggered widespread protests, including mass hartals across the country in 1928?

Which of the following leaders was instrumental in initiating and leading India’s struggle for independence?