Question

If the sin 60° = square root of three over two, then which statement is true?

Answer 1

cos 30° = square root of three over two, because the cosine and sine are complements
cos 120° = square root of three over two, because the cosine and sine are supplements
cos 30° = 0, because the cosine and sine are complements
cos 120° = 0, because the cosine and sine are supplements

Answer 2

sin and cos are complemntary
which means
\(cos(\theta) = sin(90-\theta) \)

Answer 3

so which do u think the answer is?

Answer 4

don't quite understand

Answer 5

just substitute \( \theta=60^0 \) and see what u get

Answer 6

* substitute in the formula i gave

Answer 7

so cos 30=0

Answer 8

is that right or is it cos 30= sr3/2

Answer 9

did u try substituting in the formula like i said?

Answer 10

yes i did i think the answer is a, cos 30= sr3/2 i that right?

Answer 11

yes

Answer 12

i hope u understood why thats the right answer :)

Answer 13

yes i do thank you