Activity # 5:
Find the angle when given the value of a trigonometric
function. Round answers to the nearest 10’.To find the angle, click on the numerical value keys first and then inverse and the function key.
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Example 4: Find A if Tan A = 1.4826
Use the following sequence of keys.
1 . 4 8 2 6 inv tan
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The answer will be 56.00069928 which rounds off to 560.
Example 5: Find B if the cos B = .9026
Use the following sequence of keys.
. 9 0 2 6 inv cos dms
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The answer will be 250 29' 52" 9 which will round off to 250 30'.
Use your calculator to find the value of Ð A.
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1.) tan A = 0.1228 2.) sin A = 0.1564 3.) cosA = 0.9063 4.) tan A = 0.6048 5.) cos A = 0.6968 6.) sin A = 0.8788 7.) cos A = 0.9357 8.) sin A = 0.6018 9.) tan A = 0.0992 10.) sin A = 0.9853 11.) tan A = 0.4986 12.) sin A = 0.3773
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