2Sin a=2-Cos A, FIND SinA
2Sin a=2-Cos A, FIND SinA
divyanshu joshi , 11 Years ago
Grade 10
Trigonometry> 2Sin a=2-Cos A, FIND SinA...
2 AnswersArun Kumar
Hi
please check yourself too.
Thanks & Regards, Arun Kumar, Btech,IIT Delhi, Askiitians Faculty
Rinkoo Gupta
Cosa=2-2sina=2(1-sina)
Squaring, we get
Cos2a=4(1-sina)2
1-sin2a=4(1+sin2a-2sina)
5sin2a-8sina+3=0
Solving we get sina=1,3/5
Thanks & Regards
Rinkoo Gupta
AskIITians Faculty
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