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BSMRSTU-B_11-12
HSC - পদার্থ বিজ্ঞান ১ম পত্র
→
অধ্যায়-০২ঃ ভেক্টর
→
ডট গুণন
A
⃗
=
i
^
+
3
j
^
−
2
k
^
\vec{\mathrm{A}}=\hat{\mathrm{i}}+3 \hat{\mathrm{j}}-2 \hat{\mathrm{k}}
A
=
i
^
+
3
j
^
−
2
k
^
এবং
B
^
=
4
i
^
−
2
j
^
+
4
k
^
\widehat{\mathrm{B}}=4 \hat{\mathrm{i}}-2 \hat{\mathrm{j}}+4 \hat{\mathrm{k}}
B
=
4
i
^
−
2
j
^
+
4
k
^
হলে
A
→
⋅
B
→
=
\overrightarrow{\mathrm{A}} \cdot \overrightarrow{\mathrm{B}}=
A
⋅
B
=
?
A.
-10
B.
-9
C.
10
D.
8
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