What is the angle conversion from degrees to radians for a 90° angle?

To convert degrees to radians, you use the conversion factor ( \frac{\pi \text{ radians}}{180 \text{ degrees}} ). For a 90° angle, you apply the conversion as follows:

[

90° \times \frac{\pi \text{ radians}}{180°}

]

When you perform this calculation, it simplifies to:

[

90° \times \frac{\pi}{180} = \frac{90\pi}{180} = \frac{\pi}{2}

]

Thus, a 90° angle is correctly converted to ( \frac{\pi}{2} ) radians. This is a fundamental concept in trigonometry and is essential for anyone working with angles in the context of HVAC systems, where the correct understanding of angles can impact system design and installation.