Question 4.2.2: Finding Values of the Trigonometric Functions Use Figure 4.2...
Finding Values of the Trigonometric Functions
Use Figure 4.23 to find the values of the trigonometric functions at t=\frac{\pi}{2}.
The point P on the unit circle that corresponds to t=\frac{\pi}{2}has coordinates (0, 1). We use x = 0 and y = 1 to find the values of the trigonometric functions at \frac{\pi}{2}.
\sin \frac{\pi}{2}=y=1 \csc \frac{\pi}{2}=\frac{1}{y}=\frac{1}{1}=1
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