যদি sin (A + B) = \(\frac{\sqrt{3}}{2}\) এবং tan (A – B) = 1  A এবং B এর মানগুলি কী কী?

  1. 37,  54
  2. 35.7, 40.7
  3. 50, 10
  4. 52.5, 7.5

Answer (Detailed Solution Below)

Option 4 : 52.5, 7.5
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অনুসৃত সূত্র:

sin 60° = \(\frac{\sqrt{3}}{2}\)

tan 45° = 1

গণনা:

প্রদত্ত,

sin (A + B) = \(\frac{\sqrt{3}}{2}\)

sin (A + B) = sin 60°

∴ A + B = 60° ----(1)

এছাড়াও, প্রদত্ত

tan (A – B) = 1

tan (A – B) = tan 45°

∴ A – B = 45° ----(2)

সমীকরণ (1) এবং (2) যোগ করে পাই,

2 A = 105

A = 52.5

সমীকরণ (1) থেকে, আমরা পাব

B = 7.5

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