Differential Calculus> prove it...

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) |

Mohit Mittal , 15 Years ago

Grade 12

1 Answers

rajan jha

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?

Last Activity: 15 Years ago

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Differential Calculus> prove it...

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) |

Mohit Mittal , 15 Years ago

rajan jha

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Other Related Questions on differential calculus

the diameter of a roller is 84 cm and its length is 120 cm. it takes 500 complete revolution to move once over to level a playground. find the area of the playground in square m?

differential calculus

Find dy/DX when y=x^sinx+sin-1√x. Please give me the solution of this problem.

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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) |

Find dy/DX when y=x^sinx+sin-1√x.

Please give me the solution of this problem.

Example 20. (i) In a AABC, find the maxima and minima of u = sin A sin B sin C
where A + B + C = T
(ii) In a plane triangle ABC, find the maximum value of cosA cosB cosC.