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(00/ - 0054: _ 00560 - 1cotA + cosA cosecA+1 _(7. सिद्ध करें

Answer»

(cotA -cosA)/(cotA + cosA) = (cosecA-1)/(cosecA+1)

(cotA -cosA)/(cotA + cosA)((cosA/sinA)-cosA)/((cosA/sinA)-cosA)

since cotA=cosA/sinA

taking cosA common from numretor and denominator nd cancelling it we get

((1/sinA)-1)/((1/sinA)+1) since 1/sinA=cosecA

therfore(cosecA-1)/(cosecA+1)

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