answer tan+1/tan=sec×cosec
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I used 1+tan^2=sec^2
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ankitarya2301:
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prove that
tan∅ + 1/tan∅= sec∅cosec∅
we have,
LHS
= tan∅ + 1/tan∅
= sin∅/cos∅ + 1/(sin∅/cos∅)
{ °.° tan∅ = sin∅/cos∅ }
= sin∅/cos∅ + cos∅+sin∅
= sin^2∅+cos^2∅/cos∅sin∅
= 1/cos∅ × 1/sin∅
{ °.° sin^2∅ + cos^2∅ = 1 }
= sec∅cosec∅
{ °.° 1/cos∅ = sec∅ , 1/sin∅ = cosec∅}
= RHS
Hence proved
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