if alpha and beta are root of acosø+bsinø=c show that cos(alpha+beta)=a^2-b^2÷a^2+b^2
shubham , 7 Years ago
Grade 11
Trigonometry> if alpha and beta are root of acosø+bsinø...
1 Answers
Deepak Kumar Shringi
Last Activity: 7 Years ago
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