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Question

If tan (A - B) = 13 and tan (A+B)=3, 0 <(A+B) < 90 and A > B then find A and B.

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Solution

tan(A+B)=3

tan(A+B)=3=tan600

A+B=60(1)

tan(AB)=13

tan(AB)=13=tan300

AB=30(2)

Adding (1) and (2),

2A=90A=45o

A+B=6045+B=60

B=6045=15o

A=45o,B=15o


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