Grade 11Trigonometry
Sin(4a-2b)+sin(4b-2a)/cos(4a-2b)+cos(4b-2a)=tan(a+b).plzz help me to prove this identity
1 Answer
N Hemavathi
= (2sin(4a-2b+4b-2a)/2 cos(4a-2b-4b+2a)/2 ) / (2cos(4a-2b+4b-2a)/2 cos(4a-2b-4b+2a)/2 )
=sin(a+b) / cos(a+b)
= tan(a+b)
hence proved
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