7 Trigonometric ratios on the calculator There are several different types of units that an angle can be measured, with degrees being one of the possibilities. Before you use the calculator to find the trigonometric angles in degrees, you should ensure that it is set to utilize the appropriate units. Always ensure that the calculator is using the correct system of angle measurement before using trigonometric ratios. This calculator is programmed to use degrees when the indicator on the display is visible at the top of the screen. If you see the indicator in the upper right hand corner the indicator, then you're calculator is set to use different units when measuring angles.Figure 9 The setting of degrees To adjust the calculator so that it works in degrees, you must use the key sequence (SETUP) (Deg). To calculate the sine, cosine or tangent of an angle, press the , or key and then enter the size of the angle. Note that the , and keys automaticall...
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