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MCQClass 12 / Math / Easy / Level 4
QUESTION
Direction cosines l m n के लिए सही relation क्या है?
What is the correct relation for direction cosines l m n?
CORRECT ANSWER
A
l^2+m^2+n^2=1
EXPLANATION INSIDE
Step 1: concept पहचानें: यह direction cosines relation है। Step 2: किसी line के direction cosines l m n हमेशा l^2+m^2+n^2=1 satisfy करते हैं। Step 3: Direction cosines...