finals

Question 1

convert 250 deg to radians

Answer 1

multiply by pie/180

Question 2

sin -1 in what quadrants

Answer 2

Q1 and Q4

Question 3

Cos-1 in what quadrants

Answer 3

Q1 and Q2

Question 4

tan-1 in what quadrants

Answer 4

Q1 and Q4

Question 5

how do you find amplitude

Answer 5

before the sin

Question 6

how do you find period

Answer 6

2 pie over B

Question 7

strategies for trig functions

Answer 7

• write everything in terms of sin and cosine
• factor
• multiply by the conjugate

Question 8

when to use law or sines

Answer 8

AAS or ASA

Question 9

when to use law of cosines

Answer 9

SAS or SSS

Question 10

what do you do for the ambiguous case?

Answer 10

SSA
-check for second solution
-

Question 11

patterns and steps for binomial expansion

Answer 11

• first write down the coefficient number & and the term number
• the degree of the first term decreases by 1
• degree or second term increases by 1
  USE THE EXPONENT GIVEN IN EQUATION

Question 12

find the partial sum for an arethmetic expression, what formula are you using? ?

Answer 12

Sn=n/2(a1+an)

Question 13

in an geometric exponential expression when finding the partial sum, what formula?

Answer 13

Sn=a1(1-r^n-1/1-r)

Question 14

when finding the nth term what do you have to do?

Answer 14

use an=a1•r^n-1 for both terms

• solve for r
• plug into left side for A1
• then put into formula

Question 15

what formula do you use for finding the sum of the infinite geometric series?

Answer 15

S=a1/1-r

- find difference by doing for example 8/5 TIMES WHAT gives you 16/25

Question 16

how do you find component form

Answer 16

(X2-X1, Y2-Y1) and then combine like terms

Question 17

how do you find magnitude

Answer 17

the SQUARE ROOT of the component form

for example v1^2 + v2^2 and then square root

Question 18

what do you do when finding direction angle?

Answer 18

sin of b/magnitude OR cos of a/magnitude

Question 19

how do you find UNIT vector

Answer 19

given points over magnitude

Question 20

find the angle between two vectors

Answer 20

multiply the two points & put them over their magnitudes, then inverse cosine

Question 21

what do you use sum and difference identities for?

Answer 21

for find the value of X

Question 22

find the 10th term in a geometric sequence, what formula?

Answer 22

an=a1•r^n-1 and split them in half

Question 23

find the nth term for a arithmetic sequence

Answer 23

• first find the rule, solve for difference, then find A1
• write the rule & distribute n-1
• set the rule equal to the highest term given and solve for N

Question 24

when should you use the “s” formulas

Answer 24

when the words “series, summation, and the E thingy is there”