Trig Functions Of Acute Angles Worksheet Page 7
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162.3 -- Finding Trig Function Values Using a
Calculator
Wednesday, August 07, 2013
12:57 PM
Finding Function Values Using a Calculator
First you must make sure that your calculator is in
degree
mode. Never flip the angle by itself --
use the reciprocal of the entire trig function when finding cosecant, secant, and cotangent which
are not on the calculator.
-1
-1
** do NOT use the sin
or the cos
keys except when finding angles (ϴ)
Ex1: Finding Function Values with a Calculator
1)
sin 49˚ 12'
2) sec 97.977˚
3)
4) sin ( 246˚)
5)
tan 68˚
6) cos 193.622˚
7) csc 35.8471˚
8) sec ( 287˚)
Ex2: Using Inverse Trig Functions to Find Angles
Use a calculator to find an angle θ in the interval [0˚, 90˚] that satisfies each condition:
1)
sin θ ≈ 0.967
2) sec θ ≈ 1.054
3) cos θ ≈ 0.921
Ex3: Finding Grade Resistance
Chapter 2 Page 7
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