Question
Download Solution PDFIf \(\rm \frac{{(1 - \cos \theta )}}{{\sin \theta }}\) = \(\frac{1}{5}\), then what will be the value of \(\rm \frac{{(1 + \cos \theta )}}{{\sin \theta }}\)?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
\(\rm \frac{{(1 - \cos θ )}}{{\sin θ }}\) = \(\frac{1}{5}\)
Concept used:
cosec2θ - cot2θ = 1
cosec2θ - cot2θ = (cosecθ + cotθ)(cosecθ - cotθ)
Calculation:
\(\rm \frac{{(1 - \cos θ )}}{{\sin θ }}\) = \(\frac{1}{5}\)
⇒ \(\rm \frac{{1}}{{\sin θ }} - \frac{cos θ}{sinθ}\) = \(\frac{1}{5}\)
⇒ cosecθ - cotθ = \(\frac{1}{5}\)
Now,
(cosecθ + cotθ)(cosecθ - cotθ) = 1
⇒ (cosecθ + cotθ)\(\frac{1}{5}\) = 1
⇒ cosecθ + cotθ = 5
⇒ \(\rm \frac{{1}}{{\sin θ }} + \frac{cos θ}{sinθ}\) = 5
⇒ \(\rm \frac{{(1 + \cos \theta )}}{{\sin \theta }}\) = 5
∴ The required answer is 5.
Last updated on Jun 10, 2025
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