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If cos (a+b)= 0 then sin (a+2b)=?.....solve it plz

Posted by Himanshi Shukla 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Pranav Choudhary 8 years, 3 months ago

Cos(a+b)=0 sin(a+b)=root under1-0^2=±1 sin(a+2b)=sin[(a+b)+b] sin(a+b)=1*cosb+ cos(a+b)=0*sinb =±cosb ans.

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