Perhaps some of my fellow shade-tree machinists would have a use
for my easy way to figure the three most common angles.
First you need a scientific calculator, such as a Texas
Instruments TI-30, which costs approximately $11. Then you
substitute your known numbers and angles for the ones in the three
problems (see examples). Keep in mind that with angles, the numbers
represent degrees, minutes and seconds, in that order.
To Find A
Use the numbers to the left of the decimals point for your
Use the numbers to the right of the decimal point to figure the
To Find A
Punch = 0.149
Punch TAN = 8.49
Punch = 29.4
Punch = 24
A = 8°, 29°, 24′
To Find B and C
Follow my format and you should have no trouble.
The tricky part of B and C is if your angle is 15°22′.
Let’s do B
Divide 22 into 60
To Find B
Punch = 5.069
B = 5.069
To Find C
Punch = 0.061
C = 0.061
You will get 0.3666667. Use 36 so your angle would read
15°36′ and then figure B. In other words, if your known angle
is 15°36′, you would punch in 15.36.
Try it and you will see how easy trig can be.
Contact Pete Fisher at 4722 West 45th Avenue, Gary IN