4. যদি |A +B | =|A ||B | হয,তাহলে A ও
B এর মধ্যবর্তী কোণ-
Marks: 1 Nagative Marks : 0.50
1. 60
2 90
3. 120
04 0
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Explanation:
I think answer is opinion 2) 90
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