finding trigonometric function values using a calculator objective: evaluate trigonometric functions...
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Finding Trigonometric Function Values using a CalculatorObjective:
Evaluate trigonometric functions using a calculator
Evaluating trigonometric functionWhen evaluating a trigonometric
function with a calculator, you need to set the calculator to the desired mode of measurement (degree or radian). Most calculators do not have keys for cosecant, secant, and cotangent functions. To evaluate these functions, you can use the reciprocal key with their respective reciprocal functions: sine, cosine and tangent. Round the answers to four decimal places.
EX: Use a calculator to evaluate the trigonometric function.
Degrees Radians
1.
2.
3.
4.
5.
6.
cos115.34
csc97 34
tan 250 15
sin0.5149
cot1.3209
sec 2.9234
Evaluating trigonometric function When you are finding the angle
measure for the given trigonometric value, you use the inverse function keys on your calculator and give the entire decimal answer for the angle in degree or radian mode.
EX: Use a calculator to find a value of the angle in the first quadrant
satisfying each of the following.
Degrees
7.
8.
9.
10.
11.
12.
sin 0.81815000
tan 6.4358841
sec 1.0545829
cos 0.96854556
Radians
cot 0.29949853
csc 1.03089436