Question

B

Answer 1

@Vocaloid

Answer 2

is the angle between a and b a 90 degree angle?

Answer 3

yes

Answer 4

alright, then what do you think the value of angle x might be?

Answer 5

55

Answer 6

D

Answer 7

hm

I got a little something diff. w/ law of sines

20/sin(90) = a/sin(35)

a = ?

Answer 8

c

Answer 9

good

Answer 10

111.47

Answer 11

A

Answer 12

hm. not quite. be careful with your signs when calculating arctan(b/a)

Answer 13

c

Answer 14

is arctan(4/3) equal to 4/3?

Answer 15

yes

Answer 16

so the theta value cannot be 4/3

Answer 17

d

Answer 18

no b

Answer 19

you must also consider the r-value

it cannot be D because sqrt(1+(-1)^2) = sqrt(2) which is positive

so B is the only sol'n

Answer 20

a and d

Answer 21

for this

Answer 22

the proof is kind of complex but B is also true, you need to re-write tan in terms of sin and cos, then combine the two fractions

so ABD

Answer 23

If the movement of a mass on a spring may be modeled with simple harmonic motion then its frequency decreases with time

Answer 24

True or false

Answer 25

True?7

Answer 26

good guess but no, for simple harmonic motion you assume constant frequency

Answer 27

c

Answer 28

i think

Answer 29

i don't really know how to solve this manually but you could just plug each choice into a calculator and see which one equals (-2)^1/3

Answer 30

ok

Answer 31

a

Answer 32

i got a

Answer 33

(a) would be the cube root of 2 not -2

Answer 34

b

Answer 35

ugh

Answer 36

d

Answer 37

B is correct

Answer 38

Let fx = cos^-1 x. Then the domain of fx is (-1,1) and the range is all real numbers. True or false

Answer 39

True

Answer 40

So false

Answer 41

notice how only certain #'s are covered in the range

so false

Answer 42

Let fx=tan^-1x .then the domain of fx is all real numbers and the range is (-pi/2 , pi/2)

Answer 43

True or false


True?

Answer 44

yes