If cot θ = , 0 < θ < 90°, 5pcos2θ sinθ = cot2θ, then the value of p is:
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Correct answer: D
Explanation
The correct answer is option 4 i.e. .
cot θ =
⇒ Hypotenuse2 = 42 + 32 = 16 + 9 = 25
⇒ Hypotenuse = 5
Now we have,
⇒ cos θ = 4/5, sin θ = 3/5
According to the question;
⇒ 5 × p × (16/25) × (3/5) = 16/9
⇒ p = (5 × 5)/27 = 25/27