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Question -

यदि sec 4A = cosec(A – 20°), जहाँ 4A एक न्यूनकोण है, तो A का मान ज्ञात कीजिए|



Answer -

sec 4A = cosec(A – 20°)
⇒ cosec (90° – 4A) = cosec(A – 20°) [sec q = (90°- q)]
तुलना करने पर
⇒ 90° – 4A = A – 20°
⇒ 90° + 20° = A + 4A
⇒ 5A = 110°
⇒ A = 22°

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