# Datexx 6518206 User Manual

## Page 12

CIVIL ENGINEERING

In this right triangle,A = 5.7 feet and a = 30 degrees.
Determine the value of C.

sin a = A / C
sin 30 degrees = 5.7 / C
C = 5.7 / sin 30 degrees
C = 5.7 / .5
C = 11.4

Mode

Press

Display

DEG

5.7 [÷]

5.7

30 [sin]

.5

[=]

11.4

In this right triangle,
A = 6 feet and C = 15 feet.
Determine the values of a, b and B.

sin a = A / C
sin a = 6 / 15 = 0.4

sin–1 .4 = 23.58
a = 23.58 degrees
b = 90 – 23.58 = 66.42 degrees
cos a = B / C
cos 23.58 = B / 15
B = cos 23.58

×

15

B = .9165

×

15 = 13.7475 feet

23

APPLICATIONS AND EXAMPLES

Calculate the future value of a \$1000 investment
compounded annually at a rate of 6% for 7 years.

FV

=

p (1+i)n

=

1000 (1+0.06)7

=

1503.63

Press

Display

1 [+] 0.06 [=] [xy] 7[=]

1.503630259

[

×

] 1000 [=]

1503.630259

PHYSICS
If a ball is thrown upward with a velocity of 75 feet
per second, what is its velocity at the end of 1.6 sec-

onds (g=32.2 ft/sec2)?

Velocity:

V = Vo – gt

= 75 – (32.2

×

1.6)

= 23.48 ft/sec.

Height:

S = Vot – 1/2 gt2

= (75

×

1.6) – (1/2 x 32.2

×

(1.6)2)

= 78.784 ft.

Press

Display

75 [–] 32.2 [

Ч

] 1.6 [=]

23.48

75 [

Ч

] 1.6 [–] 2[1/x] [

Ч

]

0.5

32.2 [

Ч

] 1.6 [x2] [=]

78.784

22