Question
Download Solution PDF\(\rm \left(\frac{\cos A}{1-\sin A}\right)+\rm \left(\frac{\cos A}{1+\sin A}\right)=4\) ,అయిన A విలువ ఎంత అవుతుంది? (0° < A < 90°)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFలెక్కింపు :
\(\frac{cosA(1 + sinA) + cosA(1 - sinA)}{{(1 + sinA)}{(1 -sinA)}}\)
⇒ \(\frac{cosA + cosA.sinA + cosA - cosAsinA}{{(1 - sinA)}{(1 + sinA)}}\) = 4
⇒ 2/cosA = 4
⇒ cosA = 1/2
⇒ A = 60°
∴ సరైన సమాధానం 60°.
Last updated on Jul 8, 2025
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