1. ## Related Rates (?)

Hi there. I wonder if anyone can help me understanding and solving this?

Thank you!

The minute hand on a clock is 8 cm long and the hour hand is 5 cm long. Give an expression for d, the distance between the tips of the hands, in terms of a, the angle between the hands.

2. The minute hand on a clock is 8 cm long and the hour hand is 5 cm long. Give an expression for d, the distance between the tips of the hands, in terms of a, the angle between the hands.
law of cosines ...

$d = \sqrt{8^2 + 5^2 - 2(8)(5)\cos{a}}$

3. You and mvho in the same class or something? This is very similar to the first problem in this thread: http://www.mathhelpforum.com/math-he...-problems.html . Same variables, too!

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