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Mathematics 15 Online
OpenStudy (anonymous):

help?

OpenStudy (anonymous):

with!?

OpenStudy (anonymous):

sin35cos25+cos35sin25=?

OpenStudy (anonymous):

how to do?

OpenStudy (anonymous):

one sec lemme try and figure it out first

OpenStudy (anonymous):

That's an application of the sum rule in trig. sin(u+v)=sin(u)cos(v) + cos(u)sin(v)

OpenStudy (anonymous):

So sin35cos25+cos35sin25 = sin(35+25) = sin(60) which is one of the special angles.

OpenStudy (anonymous):

thanks

OpenStudy (anonymous):

how about this tg46-tg1 _________ 1+tg46tg1

OpenStudy (anonymous):

?

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