exam flashcards

Question 1

polar form

Answer 1

r(cosx+isinx)

Question 2

1 in polar form

Answer 2

1=cos2pi+isin2pi

Question 3

integers

Answer 3

Z (-2, -1, 0, 1, 2)

Question 4

natural numbers

Answer 4

N -positive integers (1, 2, 3)

Question 5

whole numbers

Answer 5

W (0, 1, 2, 3)

Question 6

real numbers

Answer 6

R -every number (rational and irrational)

Question 7

contradiction

Answer 7

assume conjecture is false

Question 8

A’= -A

Answer 8

skew symmetric matrix

Question 9

skew symmetric matrices always have

Answer 9

0s in the lead diagonal

Question 10

redundancy means

Answer 10

there is an infinite number of solutions

Question 11

cosecx=

Answer 11

1/sinx

Question 12

cotx=

Answer 12

1/tanx

Question 13

cos^2x-sin^2x=

Answer 13

cos2x

Question 14

f’’(x)>0

Answer 14

minimum t.p.

Question 15

f’’(x)<0

Answer 15

maximum t.p.

Question 16

2sin^2x=

Answer 16

1-cos2x

Question 17

If’(x).f(x)=

Answer 17

1/2(f(x))^2+c

Question 18

2cos^2x=

Answer 18

1+cos2x

Question 19

sin2x=

Answer 19

2sinxcosx

Question 20

displacement =

Answer 20

|(x(t))^2+(y(x))^2|

Question 21

direction=

Answer 21

tana= dy/dt / dx/dt

Question 22

tanx=0/1

Answer 22

0

Question 23

tanx=0/-1

Answer 23

pi

Question 24

if A=A’

Answer 24

the matrix is symmetrical

Question 25

A+B=

Answer 25

A’+B’

Question 26

co prime

Answer 26

having no positive factors in common aside from 1

Question 27

Itanx/cosx=

Answer 27

secx

Question 28

(n-2)!=

Answer 28

(n-2).(n-3)!