evaluate sec 41 degree. sin 49 degree + cos 49 degree. cosec 41 degree
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sec41 . sin49 + cos 49 . cosec 41
= cosec 49 . sin 49 + cos 49 . sec 49
= 1/sin49 . sin49 + cos 49. 1/cos49
= 1 + 1
= 2
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