IF A+B = π/4
• Prove that
(1 + tan A) (1+ tanB) = 2
Answers
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Step-by-step explanation:
A+B=π/4
taking tan in both side,
=>tan(A+B)=tan(π/4)
=>(tanA+tanB)/1-tanAtanB=1
=>tanA+tanB=1-tanAtanB
=>tanA+tanB+tanAtanB=1
=>tanA+tanB+tanAtanB+1=2
=>(tanA+1)+tanB(tanA+1)=2
=>(1+tanA)(1+tanB)=2 [proved)
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