document.write( "Question 49324: \"sin%28a+%2B+b%29+=+sin%28a%29cos%28b%29+%2B+cos%28a%29sin%28b%29\"
\n" ); document.write( "\"cos%28a+%2B+b%29+=+cos%28a%29cos%28b%29+-+sin%28a%29sin%28b%29\"
\n" ); document.write( "\"tan%28a+%2B+b%29+=+%28tan%28a%29+%2B+tan%28b%29%29%2F%281+-+tan%28a%29tan%28b%29%29\"
\n" ); document.write( "Are those correct? \n" ); document.write( "
Algebra.Com's Answer #32737 by Osran_Shri(18)\"\" \"About 
You can put this solution on YOUR website!
\"Yes\" all of your formulae listed are correct.\r
\n" ); document.write( "\n" ); document.write( "Here are some more for your reference again: \r
\n" ); document.write( "\n" ); document.write( "sin(A+B)=sin(A)cos(B)+cos(A)sin(B), \r
\n" ); document.write( "\n" ); document.write( "sin(A-B)=sin(A)cos(B)-cos(A)sin(B), \r
\n" ); document.write( "\n" ); document.write( "cos(A+B)=cos(A)cos(B)-sin(A)sin(B), \r
\n" ); document.write( "\n" ); document.write( "cos(A-B)=cos(A)cos(B)+sin(A)sin(B), \r
\n" ); document.write( "\n" ); document.write( "tan(A+B)=(tan(A)+tan(B))/(1-tan(A)tan(B)) \r
\n" ); document.write( "\n" ); document.write( "tan(A-B)=(tan(A)-tan(B))/(1+tan(A)tan(B))
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