az and dy az Ql:- Find the if Z = x* sin x y.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 93E
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2 %A. l.
• OO0 :E
2_53504059321845...
Chapter Four
Partial derivative
Advanced Calculus
Dr. Khalid Utub
Sheet 7
az
Ql:- Find the and
ду
,if Z x* sin x y
dx
Q2:- Find f,, fe fa if f(p,0,p) = p? cos o sin 0.
Q3:- Find f. fy if f(x, y) =
=ży
y+cos x
dw
Q4:- Express in term of t, if w =+2, x = cos?t, y = sin?t and z =
Q5:-Find in term of t, if w = xy , x = cos t and y = sin t, when t =
%3D
dt
dw
.
dt
Q6:-Find
dr
aw
and if
1) W = x? + y2 ,x =r-s and y =r+s
2) W = Ln(x2 + y? + 2z) ,x =r+s,y=r-s and z = 2rs.
%3D
ey
Q7:- If W = xy+
y?+1
Show that -w aw
дхду
Mze
ayöx
Q8:- Find the second order partial derivatives of the following function
1) f(x, y) = x2y + cos y + y sin x
2) r(x, y) = Ln(x + y)
4) f(x, y) = Y
!!
X-y
3) r(x, y) = Ln(4x – 5y)
x+y
Q9:- Find w
= 1, ..,n if W = cos(x, + 2xrz + 3x3 + ..+ nx,).
aw
Q10:- Find , i = 1,.,n if W = ( E, x).
az
Q11:- Show that the following functions satisfies the heat equation = c?, (c >0, constant).
at
1) Z = e-t sin
2) Z = e-t cos
Q12:- Show that the following functions satisfy the Laplace's equation
ax
= 0.
1) Z = Ln(x? + y?) + 2 tan-1
2) z = x2 - y? + 2xy 3) Z = e* sin y + e cos x
4R2
013:- If R =1 Show that aR ƏR (R,+R2
)
aR aR
%3D
R+R2
aw
aw
aw
dw
Q14:- Let W = f(u), where u = x + 2y + 3z. Show that
Q15:-Given that w = f(u, v), u = x +y and v = x- y. Show that
rar2
= 6
du
ax
dy
dz
aw a?w
3)
ax? ay?
aw dw
1) = 2 -O 2) w = 9rf
= 2(+)
ax ay
Q16:-Show that (x? + y? +z?)7 satisfy three-dimensional Lap lace's equation ++= 0.
017:- In polar coordinates prove that +
ayəx
du?
a?w, aw
azw
ду
ar
ay
II
Transcribed Image Text:2 %A. l. • OO0 :E 2_53504059321845... Chapter Four Partial derivative Advanced Calculus Dr. Khalid Utub Sheet 7 az Ql:- Find the and ду ,if Z x* sin x y dx Q2:- Find f,, fe fa if f(p,0,p) = p? cos o sin 0. Q3:- Find f. fy if f(x, y) = =ży y+cos x dw Q4:- Express in term of t, if w =+2, x = cos?t, y = sin?t and z = Q5:-Find in term of t, if w = xy , x = cos t and y = sin t, when t = %3D dt dw . dt Q6:-Find dr aw and if 1) W = x? + y2 ,x =r-s and y =r+s 2) W = Ln(x2 + y? + 2z) ,x =r+s,y=r-s and z = 2rs. %3D ey Q7:- If W = xy+ y?+1 Show that -w aw дхду Mze ayöx Q8:- Find the second order partial derivatives of the following function 1) f(x, y) = x2y + cos y + y sin x 2) r(x, y) = Ln(x + y) 4) f(x, y) = Y !! X-y 3) r(x, y) = Ln(4x – 5y) x+y Q9:- Find w = 1, ..,n if W = cos(x, + 2xrz + 3x3 + ..+ nx,). aw Q10:- Find , i = 1,.,n if W = ( E, x). az Q11:- Show that the following functions satisfies the heat equation = c?, (c >0, constant). at 1) Z = e-t sin 2) Z = e-t cos Q12:- Show that the following functions satisfy the Laplace's equation ax = 0. 1) Z = Ln(x? + y?) + 2 tan-1 2) z = x2 - y? + 2xy 3) Z = e* sin y + e cos x 4R2 013:- If R =1 Show that aR ƏR (R,+R2 ) aR aR %3D R+R2 aw aw aw dw Q14:- Let W = f(u), where u = x + 2y + 3z. Show that Q15:-Given that w = f(u, v), u = x +y and v = x- y. Show that rar2 = 6 du ax dy dz aw a?w 3) ax? ay? aw dw 1) = 2 -O 2) w = 9rf = 2(+) ax ay Q16:-Show that (x? + y? +z?)7 satisfy three-dimensional Lap lace's equation ++= 0. 017:- In polar coordinates prove that + ayəx du? a?w, aw azw ду ar ay II
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