Question

If the sin 60° is √3/2, then the cos ____° = _____.

Answer 1

@calculusxy

Answer 2

\(\Large\bf \color{#008353}{\text{Hey, Welcome to OpenStudy! :)}}\)

Answer 3

I'm trying to remember the right word to explain this one.
The cosine of the an angle is equal to the `compliment` of the sine of that angle.

So like:\[\Large\bf\sf \sin(90^o)\quad=\quad \cos(90^o-90^o)\quad=\quad \cos(0^o)\]\[\Large\bf\sf \sin(60^o)\quad=\quad \cos(90^o-60^o)\quad=\quad \cos(30^o)\]

Answer 4

\[\Large\bf\sf \sin(60^o)\quad=\quad \cos(30^o)\]If,\[\Large\bf\sf \sin(60^o)\quad=\quad \frac{\sqrt3}{2}\]then,\[\Large\bf\sf \cos(30^o)\quad=\quad ?\]

Answer 5

wasnt that the original question?

Answer 6

i know cos(30˚) but the square root threw me off

Answer 7

They just want you to recognize that sin 60° = cos 30˚

So you should get the same answer for cos 30˚ that sin 60˚ gave you.

Answer 8

ohh that makes so much more sense.. thx..