Trigonometry

Asked by gouthamjayarajan | 27th Oct, 2009, 10:19: PM

Expert Answer:

cos(A+B) = cosAcosB - sinAsinB

and cos(A-B) = cosAcosB + sinAsinB

cos(A+B) - cos(A-B) = (cosAcosB - sinAsinB) - (cosAcosB + sinAsinB) = -2sinAsinB

Regards,

Team,

TopperLearning.

Answered by  | 27th Oct, 2009, 11:10: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.