Area of a circle trigonometry, uses the coarea formula. Define a function formula_10 by formula_11. Note ρ is a Lipschitz function whose gradient is a unit vector formula_12 (almost everywhere). Let "D" be the disc formula_13 in formula_14. We will show that formula_15, where formula_16 is the two-dimensional Lebesgue measure in formula_14. We shall assume that the one-dimensional Hausdorff measure of the circle formula_18 is formula_19, the circumference of the circle of radius "r". (This can be taken as the definition of circumference.) Then, by the coarea formula, Similar to the onion proof outlined above, we could exploit calculus in a different way in
What Is a Man Without a Moustache? 62 based on five reviews from critics. In a review for "Variety" magazine, critic Deborah Young called "What Is a Man Without a Moustache?" "an entertaining romantic comedy" and a "good-humored film" while, on the other hand, noting that the film should be better received by local and regional audiences due to its story being "a hard sell abroad". Author and film critic Michael Atkinson, writing for "The Village Voice", expressed his divided opinion that the film "is not remarkable or ingenious" but that it still is "adept enough for a pass on." Critic Nathan Lee of "The New York