TS EAMCET · Maths · Differentiation
If \(x \cos (k+y)=\cos y\) then \(\frac{d y}{d x}\) at \(y=\frac{\pi}{2}\) is
- A \(\sin k\)
- B \(\cos k\)
- C 1
- D 0
Answer & Solution
Correct Answer
(A) \(\sin k\)
Step-by-step Solution
Detailed explanation
Given \(x \cos (k+y)=\cos y\) \[ x=\frac{\cos y}{\cos (k+y)} \] Differentiate \(x\) w.r.t ' \(y\) '…
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