Question

solve this trigonometry question

Answer 1

$( \sin(25) \div \cos(35) ) - ( \cos(25) \div \sin(35) ) \\ = (sin25sin35 - cos25cos35) \div (cos35sin35) \\ = \cos(35 + 25) \div 2((sin35 \cos(35) ) \div 2) \ \\ = 2\cos(60) \div (sin70) \\ = 1 \div \sin(70) \\ = cosec70$
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