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Tuition/Class XI-XII Tuition (PUC)

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Sin 90 is 1 & sec 180 is -1.So 1+(-1) is 0.
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Tutor

Sin 90 is 1 & sec 180 is -1.So 1+(-1) is 0
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Tutor

sin 90 =1. sec 180 = 1/cos 180 = 1/-1= -1. Answer is 1-1=0.
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Private Teacher

sin90+sec180 =sin90+(1/cos180) =1+{1/(-1)} =1-1 =0
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Tutor

Zero (0).
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Sin90=1,sec180=-1=>sin90+sec180=0
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Tutor

Sin 90 = 0 sec 180 = -1 So 1-1 = 0
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Tutor

1+(-1)=0.
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