Question
Download Solution PDFयदि tan (α + β) = a, tan (α - β) = b है, तो tan 2α का मान क्या है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
tan (α + β) = a,
tan (α - β) = b
प्रयुक्त सूत्र:
Tan (A + B) = (tan A + tan B)/{1 - (tanA × tanB)}
गणना:
हम 2α को निम्नानुसार लिख सकते हैं:
⇒ 2α = (α + β) + (α - β)
दोनों पक्षों को 'tan' से गुणा करने पर,
⇒ tan 2α = tan {(α + β) + (α - β)}
⇒ tan 2α = {tan (α + β) + tan(α - β)}/{1 - tan (α + β) × tan(α - β)}
tan (α + β) = a, और tan (α - β) = b रखने पर,
⇒ tan 2α = (a + b)/(1 - ab)
∴ सही उत्तर (a + b)/(1 - ab) है।
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