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explain Sum Identities

Trigonometry

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#1 darshan

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Posted 23 September 2013 - 06:01 AM

what is Sum Identities

#2 rajesh

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Posted 24 September 2013 - 07:40 AM

Sum identities or sum angles:
sin(A+B ) =sinA cosB + cosA sinB
cos(A+B ) =cosA cosB - sinA sinB
tan(A+B ) =$\frac{tanA+tanB}{1-tanAtanB}$

#3 Education2jobs

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Posted 15 May 2015 - 10:00 AM

Hii.

I also want to know about Sum Identities and very thanks to rajesh to help me out about this.

Thanks.





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