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If y = 5 cos x - 3 sin x then 

  1. y
  2. 2y
  3. y/2
  4. -y

Answer (Detailed Solution Below)

Option 4 : -y
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Detailed Solution

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CONCEPT:

CALCULATION:

Given: y = 5 cos x - 3 sin x

First let's find out dy/dx

As we know that,  and 

⇒ dy/dx = - 5 sin x - 3 cos x

Now, again by differentiating the above equation with respect to x we get,

Hence, correct option is 4.

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