Easy Math Class 12 Level 9

What relation holds for direction cosines l,m,n?

Direction cosines l,m,n के लिए relation क्या है?

Show answer and explanation
Correct Answer

A. l²+m²+n²=1

Explanation

Step 1: Identify direction cosines. Step 2: The sum of squares of direction cosines is always 1. so the correct option follows. Step 3: In exam questions apply the formula first.

Step 1: direction cosines पहचानें। Step 2: direction cosines के squares का sum हमेशा 1 होता है। इसलिए सही विकल्प मिलता है। Step 3: ऐसे प्रश्नों में पहले सूत्र लगाएँ।

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