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![[Post New]](/templates/default/images/icon_minipost_new.gif) 17 Apr 2008 15:11:15 IST
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if cos(A+B)=4/5 and sin(A-B) =5/13,find tan2A if A,B lies between 0 and pi/4
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17 Apr 2008 15:18:06 IST
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is the answer 56/33
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17 Apr 2008 15:20:48 IST
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yesssssssssssssssssssssss
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17 Apr 2008 15:21:54 IST
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tan2A = tan ( A+ B +A- B )
= tan (A + B) + tan ( A - B ) / 1 - tan(A + B) tan ( A - B )
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tan ( A+B ) = 3 /4
and tan ( A - B ) = 5/13
RATE ME
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17 Apr 2008 15:28:39 IST
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i think the ans. is 56/33
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<SRIRAM.A> on high way of IIT
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