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I know sin(a) is 4/7, where a is in the second quadrant. I know cos(B) is -3/8, where b is in the thrid quadrant. How do I find the exact value of tan(a+b)?
for sin(A) = 4/7 to be in II Quadrant
A = 180 - sin^-1(4/7) or 145.150095
for cos(B) = -3/8 to be in III Quadrant
B = 360 - cos^-1(-3/8) or 247.975687
tan(A + B) = tan(180 - sin^-1(4/7) + 360 - cos^-1(-3/8))
tan(A + B) = tan(540 - sin^-1(4/7) - cos^-1(-3/8))
tan(A + B) = .6525
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Sherman D.
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I can answer questions dealing in mathematics of all kinds except for Physics and Calculus, but i can answer questions in Pre-Calculus and Chemistry. I can also answer questions in Recipes of all kinds. I can find games cheats/walkthroughs, but i can`t find a specific game online or offline. I can also do history and recipes for alcoholic beverages.
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