\( a, b, c\) are vectors such that  \( a, b,... - Solved | MCA Prep" /> \( a, b, c\) are vectors such that  \( a, b,... - Solved | MCA Prep" /> \( a, b, c\) are vectors such that 

Question 29

Mathematics Scalar and Vector Products Hard

If&nbsp;<span class="math-tex">\(\vec a, \vec b, \vec c\)</span>&nbsp;are vectors such that&nbsp;<span class="math-tex">\(\vec a + \vec b + \vec c = 0\)</span>&nbsp;and&nbsp;<span class="math-tex">\(|\vec a| = 7, |\vec b| = 5, |\vec c| = 3\)</span>, then the angle between the vectors&nbsp;<span class="math-tex">\(\vec b\)</span>&nbsp;and&nbsp;<span class="math-tex">\(\vec c\)</span>&nbsp;is?

(A) 60&deg;
(B) 30&deg;
(C) 45&deg;
(D) 90&deg;
✓ Correct Answer: Option A Verified Solution

📘 Step-by-Step Solution & Detailed Explanation:

Move b and c in one side and take square on both side

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