SOLUTION: Establish the identity sin (alpha + beta)/(cos alpha cos beta) = tan alpha + tan beta

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Question 518176: Establish the identity
sin (alpha + beta)/(cos alpha cos beta) = tan alpha + tan beta
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
sin+%28alpha+%2B+beta%29%2F%28+cos%28alpha%29cos%28beta%29+%29    =    tan%28alpha%29 + tan%28beta%29



%28sin%28alpha%29cos%28beta%29%29%2F%28+cos%28alpha%29cos%28beta%29+%29 + %28cos%28alpha%29sin%28beta%29%29%2F%28+cos%28alpha%29cos%28beta%29+%29

 + 

sin%28alpha%29%2Fcos%28alpha%29 + sin%28beta%29%2Fcos%28beta%29+

tan%28alpha%29 + tan%28beta%29

Edwin