State whether following are true or false. Justify your answer. cot A is not defined for A =0^{circ}

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8. Introduction to Trigonometry

easy

State whether the following are true or false. Justify your answer.

$\cot$ $A$ is not defined for $A =0^{\circ}$

Option A

Option B

Option C

Option D

Solution

$\cot \,A$ is not defined for $A =0^{\circ}$

As $\cot A=\frac{\cos A}{\sin A}$

$\cot 0^{\circ}=\frac{\cos 0^{\circ}}{\sin 0^{\circ}}=\frac{1}{0}=$ undefined

Hence, the given statement is true.

Standard 10

Mathematics

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