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Advanced Math/inverse trig

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Expert: Sherman D. - 9/2/2009


Question
sin( arcos(-3/5))

Answer
sin(arccos(-3/5))

arccos(-3/5) is the same as saying

cos(A) = -3/5

(-3)^2 + y^2 = 5^2
9 + y^2 = 25
y = 4

ANS = sin(arccos(-3/5)) = 4/5

if you go to www.quickmath.com, click on Solve, which is located under Equations, type in

x = sin(arccos(-3/5))
and set the variable to x, then click solve and it will also give you (4/5) as your answer.

if you use your computer's calculator, and click (-3/5), then click Inv.(inverse) cos, then press sin, it will give you .8 as your answer, which is (4/5).

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Sherman D.

Expertise

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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Mathematics, Recipes, History, and Games.

Education/Credentials
High School graduated. I graduated with honors, and i was in Beta Club for a year and a half.

Awards and Honors
Principle's list and A and B honor roll in high school only.

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