3 years ago

Unit 8: Right Triangles & Trigonometry homework 4 trigonometry finding sides and angles

Mathematics

1 answer:

sergejj [24]3 years ago

3 0

Answer:

Step-by-step explanation:

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Which of the following is a quadrantal angle

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Question:

Which of the following is a quadrantal angle?

a) π/2 b) π/3 c) 2π/3 D) 4π/5

Answer:

$(a)\ \frac{\pi}{2}$

Step-by-step explanation:

Required

Which of a to d is a quadrantal angle

An angle is said to be quadrantal if and only if the angle has its terminal side on the x or y axis.

Such angles (in degrees) are: 90, 180, 270, etc.

So, we have:

$(a)\ \frac{\pi}{2}$

[Convert to degrees]

$\frac{\pi}{2} = \frac{180}{2}$

$\frac{\pi}{2} = 90$

Hence:

$(a)\ \frac{\pi}{2}$ is a quadrantal angle

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