sin 30° / sin 45° + tan 45° / sec 60° - sin 60° / cot 45° - cos 30° / sin 90°
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AnswerSin 30 = 1/2
sin 45 = 1/root2
tan 45 = 1
sec 60 = 2
sin 60 = root3/2
cot 45 = 1
cos 30 = root3/2
sin 90 = 1
=> sin 30° / sin 45° + tan 45° / sec 60° - sin 60° / cot 45° - cos 30° / sin 90°
=> (1/2)/(1/root2)+(1)/(2) - (root3/2)/(1) - (root3/2)/(1)
=> 1/ root2 + 1/2 - root3/2
=> 1/ root2 + (1-2root3)/2
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