Question

How are the sin 20° and the cos 70° related? Explain using complete sentences.

Answer 1

@Ryan2416 please help me with this on tooo. (:

Answer 2

http://ichthyosapiens.com/School/Math/Trig/ch05CofunctionIdentities.jpg <--- see the relationship?

Answer 3

\(\bf cos(90^o-\theta)=sin(\theta)\qquad thus\\ \quad \\
cos(90^o-20^o)=sin(\square ?)\)

Answer 4

yeah both are 90-0 =0

Answer 5

They are both the same. Sin(20) equals roughly .342 and cos (70) roughly equals .342

Answer 6

\(\bf cos(90^o-\theta)=sin(\theta)\qquad thus\\ \quad \\
cos(90^o-20^o)=sin(20^o)\implies cos(70^o)=sin(20^o)\)

Answer 7

thank you guys so much. i wish i understood this stuff. its just a bunch of letters and numbers to me xD

Answer 8

yw

Answer 9

okay so writing it in a complete sentence would be, the sin 20 ad the cos 70 are related because they are equal.
cos 90-0 = sin 0
cos 90-20= sin 20 -> cos 70=sin=20
????

Answer 10

and*

Answer 11

Math takes a lot of practice to understand

Answer 12

i hate it. lol i took algebra 1 in 8th grade and i didnt pass until the beginning of my 10th grade year.