the value of tan A/2-cot A/2 +2 cot A
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Answer:
L.H.S=tanA−cotA
=
cosA
sinA
−
sinA
cosA
=
sinAcosA
sin
2
A−cos
2
A
=
2sinAcosA
−2(cos
2
A−sin
2
A)
=
sin2A
−2cos2A
=−2cot2A
=R.H.S
Hence proved.
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