Question

help

Answer 1

@Vocaloid

Answer 2

for the first one you need to find the coordinate (cos(theta), sin(theta))

since cos(pi/12) and sin(pi/12) are not on the unit circle you need to re-write pi/12 in terms of angles that ~are~ on the unit circle and use difference identities to find the exact value of cos(pi/12) and sin(pi/12)

Answer 3

as a hint, pi/12 = pi/3 - pi/4

Answer 4

so b

Answer 5

@Vocaloid

Answer 6

check your calculations again

cos(pi/12) = cos(pi/3 - pi/4)

then use the last cos identity to find cos(pi/12)

Answer 7

d maybe i see that both are in q1

Answer 8

perform the appropriate calculation for alpha = pi/3 and beta = pi/4

Answer 9

clockwise is apparently a negative rotation so means counterclockwise is positive

Answer 10

with all due respect I would appreciate it if you at least took what I have said into consideration, I've put a lot of thought into what I've written

Answer 11

we have re-written our equation as cos(pi/3 - pi/4), if we match this up with the cos difference formula we get alpha = pi/3 and beta = pi/4

plug this into our difference equation

cos(alpha)cos(beta) + sin(alpha)sin(beta) = ?

Answer 12

it must be c im looking at some examples in my lesson too semi helpful can't wait till this unit is over no more trig

Answer 13

because 60 degrees and 45 degrees there is one similar i my examples not the same but close enough

Answer 14

@Vocaloid i solved pi/12 is 15 degrees and got c for answer