Texas-instruments TI-30XS User Manual download pdf (Page 22)

Copyright © 2006 Texas Instruments Incorporated 22

Example Radian Mode

³ Problem

Find angle A of the right triangle below. Then calculate angle

B and the length of the hypotenuse c. Lengths are in meters.

Round results to one decimal place.

Reminder:

Tan p"<- @

gq4 "E <

Tan

-1

%\1 E<

n

Cos 5 V?gq4 "E

<

n

tan A = therefore m

±A = tan

-1

m

±A + m±B + 90Ä = 180Ä

therefore m

±B = 90Ä - m±A

c =

p$$""<

7

3

--

7

3

--

⎠

⎞

⎝

⎛

3

2

7

2

+

c

B

A

3

7

C

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