MA 15900 FORMULA SHEET The formulas below will be provided on all appropriate quizzes and exams. All other formulas, conversions, and rules not listed below, but used in the homework and/or lectures, will need to be memorized. 1+tan2θ=sec21+cot2=csc2sin2⎛⎝⎜⎞⎠⎟= ±−cos2cos2⎛⎝⎜⎞⎠⎟= ±+cos2tan2⎛⎝⎜⎞⎠⎟=1−cossinsin2=2sincoscos2=cos2−sin2tan 2=2tan1−tan2a2=b2+c2−2bccosαA=P1+rn⎛⎝⎜⎞⎠⎟ntA=Per tx3−y3=(x−y)(x2+xy+y2)x3+y
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