Expert Math Class 12 Level 7

If |a×b|=12, |a|=4, |b|=6 and the angle is acute, what is the angle?

यदि |a×b|=12, |a|=4, |b|=6 और angle acute है, तो angle क्या है?

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Correct Answer

A. 30°

Explanation

Step 1: Identify cross product magnitude. Step 2: |a×b|=|a||b|sinθ gives 12=24sinθ, so sinθ=1/2 and the acute angle is 30°. Step 3: Exam tip: Cross product uses sine of the angle.

Step 1: अवधारणा cross product magnitude है। Step 2: |a×b|=|a||b|sinθ से 12=24sinθ, इसलिए sinθ=1/2 और acute angle 30° है। Step 3: Exam note: cross product में sine angle आता है।

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