Cos(A+B) + Cos(A-B)/Sin(A+B) + Sin(A-B)= CotA

Verify the identities. If you can list all the steps as you go through it please do including formulas
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1 Answer

(cosAcosB-sinAsinB+cosAcosB+sinAsinB)/(sinAcosB+cosAsinB+sinAcosB-cosAsinB)=

2cosAcosB/2sinAcosB=cosA/sinA=cotA QED
by Top Rated User (1.2m points)

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