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TS EAMCET · Maths · Differentiation

If y=cos-1(tanhx)+sinh(sin6x), then dydx=

  1. A -1coshx+6cos6xcoshsin6x
  2. B 1coshx-6cos6xcoshsin6x
  3. C -1coshx-6cos6xcoshsin6x
  4. D 1coshx+6cos6xcoshsin6x
Verified Solution

Answer & Solution

Correct Answer

(A) -1coshx+6cos6xcoshsin6x

Step-by-step Solution

Detailed explanation

y=cos-1(tanhx)+sinh(sin6x), ⇒dydx=-11-tan2hxddxtanhx+coshsin6x.ddxsin6x ⇒dydx=-11-tan2hxsec2hx+coshsin6x.cos6x.6 ⇒dydx=-1sechxsec2hx+coshsin6x.cos6x.6 ∴dydx=-1coshx+coshsin6x.cos6x.6 =-1coshx+6cos6xcoshsin6x Hence, option 1 is correct.
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