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Pre-Calc Homework Solutions 423

# Pre-Calc Homework Solutions 423 - Section 10.5 42 x 2 y 2 r...

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Unformatted text preview: Section 10.5 42. x 2 y 2 r 2 cos2 r 2(cos2 1 r 2 sin2 sin2 ) 1 1 423 36. r sin r sin 3 2 3 2 6 2 cos 1 r cos 2 cos 6 sin 2 6 2 r sin y 1 x 2 2 4, a line slope 1 3 x 37. x 7 r cos 3y , y-intercept 4 3 . 43. [ 4.7, 4.7] by [ 3.1, 3.1] 7. The graph is a vertical line. x2 y2 9 4 r 2 cos2 9 1 r 2 sin2 4 2 1 2 r (4 cos 2 9 sin ) 36 [ 9.4, 9.4] by [ 6.2, 6.2] 38. y 1 r sin 1 The graph is a horiztonal line. [ 4.7, 4.7] by [ 3.1, 3.1] 44. xy 2 (r cos )(r sin ) 2 r 2 cos sin 2 r 2 2 cos sin 4 r 2 sin 2 4 [ 4.7, 4.7] by [ 3.1, 3.1] 39. x y r cos r sin 4 tan 1 4 [ 4.7, 4.7] by [ 3.1, 3.1] More generally, 2k for any integer k. 45. y 2 4x r 2 sin2 r sin2 The graph is a slanted line. 4r cos 4 cos [ 4.7, 4.7] by [ 3.1, 3.1] 40. x y r cos 3 r sin 3 [ 4.7, 4.7] by [ 3.1, 3.1] 46. x 2 xy y 2 1 (r cos )2 (r cos )(r sin ) r 2(1 cos sin ) 1 (r sin )2 1 [ 9.4, 9.4] by [ 6.2, 6.2] 41. x 2 r2 y2 4 4 or r 2 (or r 2) [ 3, 3] by [ 2, 2] [ 4.7, 4.7] by [ 3.1, 3.1] ...
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