Evaluating Trigonometry using a Calculator

In this lesson, we will learn how to use a calculator to find the trigonometric value of an angle.

Related Topics: More Lessons on Trigonometry

We could make use of a scientific calculator to obtain the trigonometric value of an angle.

Example:

Find the value of cos 6.35˚.

Solution:

Press

cos 6.35˚ = 0.9939 (correct to 4 decimal places)

Example:

Find the value of sin 40˚ 32 ’ .

Solution:

Press


sin 40˚32 ’ = 0.6499 (correct to 4 decimal places)

Example:

Find the value of x for the following triangle. (Give your answer correct to 4 decimal places)


Solution:

x = 6.21 × sin 31.3˚ = 3.2262



Determining Trigonometric Function Values on the Calculator
Using the TI 84 to find function values for sine, cosine, tangent, cosecant, secant, and cotangent.



Soh Cah Toa How to Use Your Calculator
This video goes over how to use your calculator to solve trigonometry. Making sure your in the right mode and entering things in the right order depend on which of the 2 types of calculators you have. This video goes over how to solve with both.





Trigonometry with your Calculator
Finding trig ratios and angles using your calculator



The following video shows how to use a calculator to obtain the trigonometric value of an angle.





This trigonometric calculator will help you to calculate the trigonometric functions like sine, cosine, tangent, cotangent, secant, cosecant. The angles are to given in degrees and not radians.







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