 # Inverse Trigonometric Functions Worksheet - Using a Calculator

Objective: I know how to use the calculator to find the inverse of the trigonometric functions: sin, cos, tan.

If we know the size of an angle, we can find the sin, cos and tan of the angle by using a scientific calculator. We can also use a calculator to find the inverse or reverse of this. If we know the sin, cos or tan of an angle, we can find the size of the angle.

Refer to the lesson on how to use the calculator to evaluate the inverse of trigonometric functions for more information and examples.

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Use your calculator to find the following angles whose trigonometric functions are given.

tan A = 1.23
A = °

tan B = 2.56
B = °

sin C = 0.78
C = °

sin D = 0.527
D = °

cos E = 0.352
E = °

cos F = 0.725
F = °

tan G = 0.786
G = °

tan H = 1.275
H = °

sin I = 0.468
I = °

sin J = 0.867
J = °

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