SOLUTION: Establish the identity Cos(a+B)/CosaSinB= Cot B

SOLUTION: Establish the identity Cos(a+B)/CosaSinB= Cot B - tan a

Question 1150576: Establish the identity

Cos(a+B)/CosaSinB= Cot B - tan a
Answer by Edwin McCravy(20066) (Show Source): You can put this solution on YOUR website!



Work with the left side

Use formula for cos(A+B)



Break into two fractions:



Cancel cos(A)'s in the first fraction and sin(B)'s in second fraction:





Use quotient identities for cotangent and tangent:



Edwin

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