Question

Math help ! Medals will be given !

Answer 1

Find the cosine and sine of 210º. Round your answers to the nearest hundredth if necessary.

Answer 2

@.Sam.

Answer 3

HELP ANYONE ?

Answer 4

\[\cos 210 = \cos (180 + 30) = - Cos30\]

Answer 5

I don't have a calculator my battery died. so can you put that in ?

Answer 6

the 210º is one of the special angle in trigono
u have to memorize it, to get the value of sine , cosine , also tan

Answer 7

-Cos30 = - 0.866 = -0.87

Answer 8

–1, 0
–0.5, –0.87
–0.55, –0.95
–0.87, –0.5

Answer 9

Option 4 would be my guess.

Answer 10

I need a 100% answer that's correct.

Answer 11

@Jas9420

Answer 12

Yup. It is the fourth option.
\[\sin 210 = Sin (180 + 30) = -Sin 30 = -\frac{ 1 }{ 2}\]
Which is nothing but -0.5.