ANGLES Angle Arithmetic In DMS (Page 2 of 2)

As a second example, let's find the complement and supplement of 25° 7' 30". To find the complement, subtract the angle measure from 90°. To find the supplement, subtract from 180°.

 2nd QUIT key. CLEAR key.

 90 Minus key. 25 2nd ANGLE key. 1: menu selection. 7 2nd ANGLE key. 2: menu selection. 30 ALPHA key. ALPHA Quote key. ENTER key.

 Calculator screen image.

Now use the 2nd ENTRY feature to repeat the previous command, then edit the line by changing 90 to 180. Press 2nd key. Left arrow key. to move the cursor to the far left. Use DEL key. to delete the 90, then 2nd INS key. to insert 180.

 2nd ENTRY key. 2nd key. Left arrow key.

 DEL key. DEL key. 2nd INS key. 180 ENTER key.

 Calculator screen image.
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