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Grade 11Trigonometry

If alpha,beta,gama,delta are in progression thenCos beta is equal to

Profile image of keerthe sre
8 Years agoGrade 11
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1 Answer

Profile image of kshirsagaryashraj@gmail.com
8 Years ago
Bro ,but in which progressionArithmetic or geometric or harmonic ...If in arithmetic progression then Cos(beta) = cos(alpha+gamma /2)