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Grade: 12 
        if sin(2a)=4sin2b,show that 5tan(a-b)=3tan(a+b)
8 years ago

Answers : (1)

Sunil Raikwar
askIITians Faculty
45 Points 
							sin2a/sin4b=4
sin2a+sin2b/sin2a-sin2b=4+1/4-1[by componendo & dividendo]
2sin(a+b)cos(a-b)/2cos(a+b)sin(a-b)=5/3
tan(a+b)/tan(a-b)=5/3
5tan(a-b)=3tan(a+b)
Thanks & Regards
Sunil Raikwar
askIITians Faculty
6 years ago
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