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If costheta=(acosphi+b)/(a+bcosphi). Sho...

If `costheta=(acosphi+b)/(a+bcosphi)`. Show that : `tan.(theta)/(2)=pmsqrt((a-b)/(a+b))tan.(phi)/(2).`

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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE-MCQs
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  14. For any angles A,B,C. (sin(A-B))/(cosA.cosB)+(sin(B-C))/(cosB.cosC)+(s...

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