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What is the value of Sec120?

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Sec120=sec(90+30)=-cosec 30= -2
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Sec(120)=sec(90+30)=-Cosec30=-2
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Tutor

Sec(180-60)°= -sec60°=-2
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we know that cos and sec are inverse to each other...... since cos120=cos(180-60)=-cos60=-1/2 hencesec120=1/cos120=-2
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Tutor

sec120= sec(90+30) -cosec30 -1/sin30 -2
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-2
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Tutor

Sec(180-60)°=-sec60°=-2
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Math Magician

Sec(180-60)=-Sec60=-2/sqrt(3)
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-2
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Physics and Math Enthusiast_BITS-PILANI,PILANI CAMPUS

sec (120 degrees) = 1/cos(120 degrees) = 1/(-0.5) = -2
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