x + y = 14 ও x - y = 6 হলে xy এর মান কত?

A

36

B

40

C

44

D

48

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Updated: 1 month ago

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যদি cotθ = 1 হয়, তবে sinθ - cos(- θ) = কত?

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A

1

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2

C

0

D

√2

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যদি x : y = 2 : 3 এবং y : z = 5 : 7 হয়, তবে x : y : z = ?

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A

6 : 9 : 14

B

10 : 15 : 21

C

2 : 5 : 7

D

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 যদি P = {1, 2, 3, 4, 5, 6}, Q = {2, 3, 4, 6} এবং R = {1, 5, 6} হয়, তবে (P - Q) ∪ R = কত?

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A

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B

{1, 5, 6}

C

{4, 5, 6}

D

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Updated: 1 month ago

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