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If 3 cot θ = 4 then the value of ((5 sin θ + 3 cos θ)/(5 sin θ – 3 cos θ)) = ?

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Question

If 3 cot θ = 4 then the value of `((5 sin θ + 3 cos θ)/(5 sin θ - 3 cos θ))` = ?

Options

  • `1/3`

  • 3

  • `1/9`

  • 9

MCQ
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Solution

9

Explanation:

On dividing num. and denom. by sin θ, we get

`((5 sin θ + 3 cos θ)/(5 sin θ - 3 cos θ)) = ((5 + 3 cot θ)/(5 - 3 cot θ))`

= `((5 + 3 xx 4/3))/((5 - 3 xx 4/3))`

= `((5 + 4))/((5 - 4))`

= 9

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Chapter 13: Trigonometric identities - MULTIPLE-CHOICE QUESTIONS (MCQ) [Page 632]

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R.S. Aggarwal Mathematics [English] Class 10
Chapter 13 Trigonometric identities
MULTIPLE-CHOICE QUESTIONS (MCQ) | Q 18. | Page 632
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