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If x = a cos3t, y = a sin3t, then  is?

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ISRO (VSSC) Technical Assistant Electrical 2017 Official Paper
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  1. tan t
  2. –tan t
  3. cot t
  4. –cot t

Answer (Detailed Solution Below)

Option 2 : –tan t
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Detailed Solution

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Concept:

Where, ‘x’ is an algebraic function

Application:

Given-

x = a cos3t, y = a sin3t

Differentiation of ‘x’ with respect to ‘t’ is

Differentiation of ‘y’ with respect to ‘t’ is

So that

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