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So far we have used a graphics calculator to find the sine,
cosine or tangent
of a known angle. We can also determine an angle
if its trigonometric ratio is
known using inverse trigonometric functions.
If you are using another calculator, consult its instruction booklet or
ask your teacher for help.
Press QUIT to return to the Home
Screen and clear the screen if necessary. Then press:
to obtain the angle whose sine is 0.5.
The solution is usually set out as follows:
Example 9
Solution:
We set out the solution as follows:
Note:
We set out the solution as follows:
Note:
We set out the solution as follows:
Note:
Key Terms
inverse trigonometric functions
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