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OpenStudy (anonymous):
Please help? Evaluate: (tan37degrees+tan23degrees)/(1-tan37degrees tan23degrees) The second step is equal to? a. 1/tan(37degrees - 23degrees) b. tan(37degrees - 23degrees) c. tan(37degrees + 23degrees) d. 1/tan(37degrees + 23degrees)
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OpenStudy (callisto):
I think the identity \(\large tan (a \pm b) = \frac{tana \pm tanb}{1\mp tanatanb}\) Can help you Put a = 37 degrees and b = 23 degrees, observe the signs and get your answer!
OpenStudy (anonymous):
Thanks so much! I got c. :)
OpenStudy (callisto):
Welcome :)
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