cos 15° cos 35° cesec55° cos60° cosec 75°=1/2
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Step-by-step explanation:
cos15 cos35 cosec55 cos60 cosec75 = 1/2
cos15 cosec75 cos35 cosec55 cos60 = 1/2
cos(90-75) cosec75 cos(90-55) cosec55 cos60=1/2
sin75 1/sin75 sin55 1/sin55 cos60 = 1/2 (cosec = 1/sin)
cos60 = 1/2
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