Question
Download Solution PDFযদি tan A = 10/15 হয়, তাহলে cos2 A -এর মান কত?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFপ্রদত্ত:
tan A = 10/15
গণনা:
tan A = লম্ব/ভূমি
পিথাগোরাস উপপাদ্য ব্যবহার করে
কর্ণ2 = লম্ব2 + ভূমি2
কর্ণ2 = 102 + 152
কর্ণ = √325
cos A = ভূমি/কর্ণ
cos A = 15/√325
cos2 A = 225/325
∴ বিকল্প 3 সঠিক উত্তর।
Last updated on Jun 13, 2025
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