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As maths question confused about something

Why is that for cos you use the x co-ordinate and for sin you use the y co-ordinate? Thanks :smile:
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dasda
15
For cos it is adjacent/hypotenuse. Therefore x/1 =x
For sin it is opposite/hypotenuse. Y/1=y
Original post by dasda
For cos it is adjacent/hypotenuse. Therefore x/1 =x
For sin it is opposite/hypotenuse. Y/1=y

ofcourse. tysm x
Original post by dasda
For cos it is adjacent/hypotenuse. Therefore x/1 =x
For sin it is opposite/hypotenuse. Y/1=y

Also, sorry to disturb you again, but for part a how did they know the co-ordinates of the point? Did they put it into a calcualotr?
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Original post by vix.xvi
Also, sorry to disturb you again, but for part a how did they know the co-ordinates of the point? Did they put it into a calcualotr?

You're expected to know sine and cosine of 0, 30, 45, 60 and 90 degrees.
Original post by BuryMathsTutor
You're expected to know sine and cosine of 0, 30, 45, 60 and 90 degrees.


ohh yeah lol thankss

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