If tan (a+b)=x and tan(a-b)=y find the value of tan(2a) and tan(2b)
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Answered by
1
A+b=x
A-b=x
=2a=2x
A=x and
B=2x
A-b=x
=2a=2x
A=x and
B=2x
Answered by
4
tan 2a = tan [ (a+b) + (a-b)] = [tan (a+b) + tan (a-b)]/ [1- tan(a+b).tan(a-b)]
now , tan 2a= x+y/1-xy
tan 2b = tan [ (a+b) - (a-b)] = [tan (a+b) - tan (a-b)]/ [1+ tan(a+b).tan(a-b)]
now tan 2b= x-y/1+xy
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now , tan 2a= x+y/1-xy
tan 2b = tan [ (a+b) - (a-b)] = [tan (a+b) - tan (a-b)]/ [1+ tan(a+b).tan(a-b)]
now tan 2b= x-y/1+xy
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