if cosec+cot=k then show that cos= k²-1 / k²+1

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Old hero and his old acting was though 😅😂😂 3:57

Rasmitharmy-nmjw
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Sir really excellent teaching sir 😊 super

saisquare
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Thank you for the video sir!!
This is really easy

ismathunnisa
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Thank u for the video sir!! This is really easy👍

jujjavarspu.venkayyavenkay
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My sir tell in easy method but i forget please tell

Alone-Hujafha_.k