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Tan A/1-cot A+ cot A/1-tanA=1+secAcosA...prove |
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Answer» Thanks sin/cos/1-cos/sin +cos/sin/1-sin/cossin/cos /sin-cos/sin + cos/sin/cos-sin/ cossin/cos×sin/sin-cos + cos/sin×cos/cos-sinsin2 /sin(sin-cos) + cos2/sin( cos-sin)sin2/sin(sin-cos)-- cos2/sin( sin-cos)sin3--cos3/ sin(sin-cos) ( a3-b3)= (a-b) (a2+b2+ab(sin--cos) (sin2+cos2+sin×cos)/sin(sin-cos)sin2+cos2+sin×cos/sin ( sin2+cos2 =1)1+ sin×cos / sin1/sin/cos + sin /sin ( 1/sin = cosec &1 / cos= secA)cosecA sec A + 1 1+secAcosecA = r.h.s hence proved. |
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