INVERSE TRIG FUNCTIONS Expressions (Page 2 of 8)

Since tanA = a/b = 5.207/8.030, A = arctan(5.207/8.030). Remember to add the DMS command.

 2nd QUIT key. CLEAR key.

 2nd inverse tangent key. 5.207 Divide key. 8.030 Right parenthesis key. 2nd ANGLE key. 4: menu selection. ENTER key.

 Calculator screen image.

To the nearest minute, A = 32° 58'. We can now find the remaining angle, B, by subtracting the measure of A from 90°.

 90 Minus key. 32 2nd ANGLE key. 1: menu selection. 58 2nd ANGLE key. 2: menu selection. 2nd ANGLE key. 4: menu selection. ENTER key. Calculator screen image.
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