Question 1195599
<pre>
{{{drawing(520/3,400,-1,12,-1,29,
locate(0,0,A), locate(4.7,0,11), locate(11,0,C), locate(11,29,B),locate(11.3,14,28),
line(0,0,11,0),line(11,0,11,28), line(0,0,11,28) )}}}

If it looks like the above, and you want angle A then on your TI-84 
calculator, press 2ND TAN 28/11 so that you see this:

tan<sup>-1</sup>(28/11)

press ENTER

Write down what you see and put a degree mark <sup>o</sup> after it.
That will be angle A.

If you then want angle B, subtract angle A from 90<sup>o</sup>.

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{{{drawing(52000/277,400,-1,12,-1,26.7,locate(4,14,28),
locate(0,0,A), locate(4.7,0,11), locate(11,0,C), locate(11,26.7,B),
line(0,0,11,0),line(11,0,11,25.7), line(0,0,11,25.7) )}}}

If it looks like the above, and you want angle A, then on your TI-84 
calculator, press 2ND COS 11/28 so that you see this:

cos<sup>-1</sup>(11/28)

press ENTER

Write down what you see and put a degree mark <sup>o</sup> after it.
That will be angle A.

If you then want angle B, subtract angle A from 90<sup>o</sup>.

Edwin</pre>