What is the correct relation for direction cosines l m n?
Direction cosines l m n के लिए सही relation क्या है?
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Correct Answer
A. l^2+m^2+n^2=1
ExplanationStep 1: Identify the concept: this is relation of direction cosines. Step 2: Direction cosines l m n of a line always satisfy l^2+m^2+n^2=1. Step 3: Remember square sum of direction cosines is 1.
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 का square sum 1 याद रखें।