Posted by **Natash** on Saturday, November 15, 2008 at 5:31pm.

Use an addition or subtraction formula to write the expression as a trigonometric function of one number:

tan75degrees-tan15degrees/1+tan75tan15=tanAdegrees =square root B

Its asking for the value of A and B. I know A =60 degrees, what I can't figure out is B, I dont understand what its asking for

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