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tan -1 - Z Z1 ) <<br />

r<br />

cos -<br />

5 V Y g P 4 " )<br />

<<br />

r<br />

³ <strong>Pro</strong>blem<br />

Find angle A of the right triangle below. Then calculate angle<br />

B and the length of the hypotenuse c. Lengths are in meters.<br />

Round results to one decimal place.<br />

Reminder:<br />

7<br />

tan A = -- therefore m±A = tan -1 ⎛7<br />

--⎞<br />

3<br />

⎝3<br />

⎠<br />

m±A + m±B + 90¡ = 180¡<br />

therefore m±B = 90¡ - m±A<br />

A<br />

3<br />

c<br />

c =<br />

3 2 7 2 +<br />

C<br />

7<br />

B<br />

q < $ $ " " <<br />

- Z Z 7 P 3 " ) <<br />

25

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