Question
Download Solution PDFयदि tan A = 10/15 है, तो cos2 A का मान क्या है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
tan A = 10/15
गणना:
tan A = लम्ब/आधार
पाइथागोरस प्रमेय का उपयोग करने पर,
कर्ण2 = लम्ब2 + आधार2
कर्ण2 = 102 + 152
कर्ण = √325
cos A = आधार/कर्ण
cos A = 15/√325
cos2 A = 225/325
∴ विकल्प 3 सही उत्तर है।
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