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Circular Measurement of Angle

If a = 5 c, t...

Question

If $a = cot 5^{c}$ , then

A

a > 0

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B

a < 0

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C

a = 0

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D

none of these

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Solution

The correct option is B $a < 0$
Given : $a = cot 5^{c}$
We know that $1^{c} \approx 57^{\circ}$
$\Rightarrow 5^{c} \approx 285^{\circ}$
This lies in $4^{th}$ quadrant, so
$cot 5^{c} < 0$

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Circular Measurement of Angle

Standard XII Mathematics

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