SOLUTION: find the value of cos 105 degrees without using a calculator.retain radical notation.
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Question 231699
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find the value of cos 105 degrees without using a calculator.retain radical notation.
Answer by
solver91311(24713)
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Simplification of this expression is left as an exercise for the student.
Sanity check: Notice that the left hand term is smaller than the right hand term. That means that cos(105) < 0, which makes sense for a Quadrant II angle.
John