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কম্পিউটার সায়েন্স এন্ড ইঞ্জিনিয়ারিং

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901. MCQPractice set · Question 109

A×B=0 এবং A·B positive হলে vectors কেমন?

a.
same direction parallel
b.
opposite
c.
perpendicular
d.
one zero অবশ্যই

Correct answer: a

Cross zero-তে collinear; dot positive হলে same direction।

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902. MCQPractice set · Question 110

A×B=0 এবং A·B negative হলে vectors কেমন?

a.
same direction
b.
opposite direction parallel
c.
perpendicular
d.
equal

Correct answer: b

Collinear এবং negative dot মানে anti-parallel।

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903. MCQPractice set · Question 111

Dot এবং cross product একসঙ্গে কোন information দিতে পারে?

a.
relative angle ও orientation
b.
শুধু mass
c.
শুধু unit
d.
শুধু distance

Correct answer: a

Dot product cosθ এবং cross product sinθ ও normal direction বহন করে।

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904. MCQPractice set · Question 112

tanθ নির্ণয়ে dot ও cross product-এর relation কোনটি?

a.
tanθ=|A×B|/(A·B) যেখানে dot positive
b.
tanθ=A·B/|A×B| সবসময়
c.
tanθ=A+B
d.
tanθ=AB

Correct answer: a

|A×B|=ABsinθ এবং A·B=ABcosθ; ratio tanθ।

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905. MCQPractice set · Question 113

A=3 এবং B=4, A·B=6 হলে cosθ কত?

a.
1/2
b.
1/3
c.
2/3
d.
3/4

Correct answer: a

cosθ=(A·B)/(AB)=6/(12)=1/2।

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906. MCQPractice set · Question 114

A=3 এবং B=4, |A×B|=6 হলে sinθ কত?

a.
1/2
b.
1/3
c.
2/3
d.
3/4

Correct answer: a

sinθ=|A×B|/(AB)=6/12=1/2।

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907. MCQPractice set · Question 115

যদি A·B=6 এবং |A×B|=6, তবে acute angle θ কত?

a.
30°
b.
45°
c.
60°
d.
90°

Correct answer: b

tanθ=|A×B|/(A·B)=1; acute θ=45°।

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908. MCQPractice set · Question 116

Scalar triple product-এর absolute value কী মাপে?

a.
volume
b.
area only
c.
length
d.
angle

Correct answer: a

|A·(B×C)| parallelepiped-এর volume।

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909. MCQPractice set · Question 117

তিনটি vector coplanar হলে scalar triple product কী?

a.
0
b.
1
c.
maximum
d.
AB

Correct answer: a

Coplanar vectors দ্বারা parallelepiped-এর volume zero।

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910. MCQPractice set · Question 118

A·(B×C)-এ প্রথমে কোন operation করা যায়?

a.
B×C
b.
A·B only
c.
A+B
d.
A×C only

Correct answer: a

Bracket অনুযায়ী আগে B×C vector, পরে A-এর সঙ্গে dot product।

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