Question
Find the trigonometric functions of : 270°
✓
Answer
Angle of measure $270^{\circ}$ :
Let $m \angle X O A=270^{\circ}$
Its terminal arm (ray $O A)$ intersects the standard unit circle at $P(0,-1)$.
$ x=0 \text { and } y=-1$
$\sin 270^{\circ}=y=-1$
$\cos 270^{\circ}=x=0$
$\tan 270^{\circ}=\frac{y}{x} $
$=-\frac{1}{0}$, which is not defined
$\operatorname{cosec} 270^{\circ}=\frac{1}{y}$
$=\frac{1}{-1}=-1$
$\sec 270^{\circ}=\frac{1}{x}$
$=\frac{1}{0}$, which is not defined
$\cot 270^{\circ}=\frac{x}{y}=\frac{0}{-1}=0$
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