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Grade 12Differential Calculus

WHICH OF THESE IS TRUE ???

| Cos(alpha) - Cos(bets) | >= | (alpha) - (beta) |

| Cos(alpha) + Cos(bets) | >= | (alpha) - (beta) |

| Cos(alpha) - Cos(bets) | >= | (alpha) + (beta) |

| Cos(alpha) + Cos(bets) | >= | (alpha) + (beta) |

Profile image of Mohit Mittal
15 Years agoGrade 12
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1 Answer

Profile image of rajan jha
15 Years ago

take alpha= some angle(=30) and beta = some angle(=60) and then eliminate the choices and get appropriate answers this is a shortcut method for this type of questions. like my answer?

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