Question

sin 75° - cos 15 ° please answer this question

Answer 1

sin 75°-sin75°=0{cos15=sin75}

Answer 2

sin75°-cos15°=sin(45°+30°)-cos(45°-30°)
= (√3+1)/2√2-(√3+1)/2√2
= (√3+1-√3-1)/2√2
=0
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