2cos(a+b)cos(a-b)=1 so prove that tan^2=1-tan^2(b)/1+3tan^2(b)
Om Parmar , 9 Years ago
Grade 11
Trigonometry> 2cos(a+b)cos(a-b)=1 so prove that tan^2=1...
2 AnswersNishant Vora
imran
HI,
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