If |a| = 4 and |b| = 5 with angle 90°, then a·b equals:
If |a| = 4 and |b| = 5 with angle 90°, then a·b equals:
- A. 20
- B. 9
- C. 0
- D. 1
Answer: C) 0
Explanation: cos90° = 0.
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If |a| = 4 and |b| = 5 with angle 90°, then a·b equals:
Answer: C) 0
Explanation: cos90° = 0.
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