if sin(A-B)=1/2 and cos (A+B)=1/2, then values of A and B respectively are??
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sinA-B= 1/2
=> sin A-B =sin 30°
=>. A-B=30°......(I)
also,. cos A+B=1/2
=>cos A+B=cos 60°
=> A+B=60°.......(ii)
by adding (I) and (ii),we get...
2A=90°
=>A= 45°{answer}
putting the value of A in (ii),we get...
45°+B=60°
=>B=60°-45°
=>B=15°{answer}
hence the value of A and B are 45°and 15° respectively.
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