যদি y = p cos 2x + q sin 2x হয়, তাহলে  কত এর সমান হবে?

  1. -2y
  2. -4y
  3. 2y
  4. 4y

Answer (Detailed Solution Below)

Option 2 : -4y
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Detailed Solution

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ধারণা:

 

গণনা:

প্রদত্ত: y = p cos 2x + q sin 2x                    .... (1)

x এর সাপেক্ষে পার্থক্য করার পর, আমরা পাই

আমরা যেমনটি জানি যে, 

পুনরায়, x এর সাপেক্ষে পার্থক্য করার পর, আমরা পাই

সমীকরণ (1) থেকে, আমরা পাই

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