math

Question 1

arthmitic nth term

Answer 1

a1+d(n-1) remember that arthimic functions wnay to find what is added from each term to find the common difference.

Question 2

arthmitic sum of nth term

Answer 2

n(a1+a2)/2

Question 3

geometric nth term

Answer 3

(a1)(r^n-1) now remmber that geometic sequences require that you find the common ration of what is multiples rather than wnat is added like in a arthmicitc sequence.

Question 4

geometric sum of nth term

Answer 4

a1(1-r^n)/1-r this formula is shit and it rarely occures.

Question 5

trig

Answer 5

SOA CAH TOA
cosecant x = 1/sin x
sec x= 1/cos x
cotagent= 1/ tanx

Question 6

trig 2

Answer 6

SOH CAH TOA
cosecant = hpt/opposite
secant= hpt. adjecent
cotangent= adjectent. opposite

Question 7

trig identity

Answer 7

complemtary agles have specila measure
cos of that angle is 45 than sin would be 45
if sin is 20, cosine would be 70.

Question 8

trig identity two

Answer 8

tan x = sin x/cos x

Question 9

trig idenity three

Answer 9

sin^2 (x) +cos^2 (x) =1

Question 10

idendity

Answer 10

Cos is x and sin is y
Thus is cuase if you tak theata of a angle then the cosi with be adj/hpt, now adjecnt is the x and if you take sin it is opiiste/hpt. not oppiste height is the height of the y value nehse (cos, sin)

Question 11

radians pie= 180

Answer 11

degress into raidans
degree times π raidans /180

radians into degrees
raidians time 180/π radians

Question 12

coterminal angles

Answer 12

any alges like -cos(11π)