SOLUTION: Without using a calculator calculate the value of sec165
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Question 841560: Without using a calculator calculate the value of sec165
Answer by alicealc(293) (Show Source): You can put this solution on YOUR website!
All angles below are in degrees
sec(165) = sec(120+45)
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(*)Using the formula:
cos(a + b) = cos(a)*cos(b) - sin(a)*sin(b)
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(*)Remember:
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so,
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