21. If tan(A - B)=1, and sec(A + B) =2/√3 find the smallest positive
values of A and B and also their most general values.
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Step-by-step explanation:
tan(A-B)=1
A-B=45. 1st equation
Sec(A-B)=2√3
A-B=30. 2nd equation
Add 1st and 2nd equation
2A=75
A=75/2
Substitute A value in 1st equation
(75/2)-B=45
B=45-(75/2)
B=15/2
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