Evaluate sin(700 + ) − cos(200 − ) − tan(800 + ) + cot(100 − )
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Step-by-step explanation:
sin(8×90-20)-cos(3×90-70)-tan(9×90-10)-cot(1×90+10)
=-sin20°+sin70°+cot10°+cot20°
= -sin20°+sin(90-20)+cot10°+cot20°
=-sin20°+cos20°+cot10°+cot20°
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