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20-10-2020
Mathematics

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Look at the picture below. What is tan(A – B)?

Thanks!

Look at the picture below What is tanA B Thanks class=

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20-10-2020

Step-by-step explanation:

the mistake was made when the value of cos 3 pi over 2 was calculated.

tan(A-B)= ?since tan=sin/cos

sin(A-B) = sinAcosB-cosAsinB

cos(A-B) cosAcosB+sinAsinB

divide by cos on the RHS

tan(A-B)= tanA-tanB

1+tanAtanB

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