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Exact value of Tan(a-b) if Sin(a)=4/5 and pi/2<=a<=pi and tan(b)=5/12 and pi<=b<=3pi/2?

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  • Exact value of Tan(a-b) if Sin(a)=4/5 and pi/2<=a<=pi and tan(b)=5/12 and pi<=b<=3pi/2?


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