SOLUTION: Find the exact value of sec(17л/12). PLEASE HELP ME!!!!!
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Question 180774: Find the exact value of sec(17л/12). PLEASE HELP ME!!!!!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given trig expression.
Use the identity
Expand. Note: (convert to degrees if that makes it easier to see)
Use the identity to expand
Evaluate the cosine of to get (use the unit circle)
Evaluate the cosine of to get (use the unit circle)
Evaluate the sine of to get (use the unit circle)
Evaluate the sine of to get (use the unit circle)
Multiply
Combine the fractions.
Rearrange the terms.
Multiply the first fraction (which is really ) by the reciprocal of the second fraction
Multiply
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Answer:
So
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