Cot theta tan(90°-theta)-sec(90°-theta) cosec theta+sin square65°+sin square25°+ root3tan5° tan85°
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tan(90-theta) = cot theta
sec(90-theta) = cosec theta
sin 25 = sin(90-65) = cos 65
tan85 = tan(90-5) = cot5
cot theta cot theta - cosec theta cosec theta + sin square 65 + cos square 65 + Root 3 tan5 cot5
= -1 + 1 + √3
= √3
sec(90-theta) = cosec theta
sin 25 = sin(90-65) = cos 65
tan85 = tan(90-5) = cot5
cot theta cot theta - cosec theta cosec theta + sin square 65 + cos square 65 + Root 3 tan5 cot5
= -1 + 1 + √3
= √3
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