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Advanced Math/Proving Trig Identities
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Question
Hey I'm Molly i have trouble with proving identities, and
there was a question that i got confused about. It was
sin(x+y)
--------= tanx+tany
cosxcosy
sin(x + y)/(cos(x)cos(y)) = tan(x) + tan(y)
tan(x) + tan(y) =
(sin(x)/cos(x)) + (sin(y)/cos(y)) =
(sin(x)cos(y) + sin(y)cos(x))/(cos(x)cos(y)) =
this is the same as saying
sin(x + y)/(cos(x)cos(y)) =
or you could have done it this way
(sin(x)cos(y) + sin(y)cos(x))/(cos(x)cos(y)) =
((sin(x)cos(y))/(cos(x)cos(y))) + ((sin(y)cos(x))/(cos(x)cos(y))) =
(sin(x)/cos(x)) + (sin(y)/cos(y)) =
tan(x) + tan(y)
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Advanced Math
Answers by Expert:
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.
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High School graduated. I graduated with honors, and i was in Beta Club for a year and a half.
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