Math Is Fun Forum

Hannibal lecter

Member

Registered: 2016-02-11

Posts: 392

What is sine in math

What is sine and cose
Is sine is a length of something or a degree
I can't imagine the sine how thry measure it
Is it illusion quantity
If sine is a ratio then the degree ia a ratio too
So is sine same as degrees
Or there interactive example of a sine

However if the degree is 60 i can find sin and if aegree is 40 I'll get cos by dividing the opposite by adjucent
Also 90 if wanna find tan

What if the degree is 25 or 170 or 35? What will happen

Last edited by Hannibal lecter (2023-06-24 00:23:49)

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Wisdom is a tree which grows in the heart and fruits on the tongue

amnkb

Member

Registered: 2023-09-19

Posts: 253

Re: What is sine in math

What is sine and cose

definitions: sine and cosine
they are ratios of sides of right triangles

Is sine is a length of something or a degree

its a ratio of lengths of sides of a right triangle w.r.t. one of the angles of that triangle
the sides have lengths
sine does not have length
2 sides making angle at non-right corner have a size that is measured in degrees
sine is not itself degrees but is related

I can't imagine the sine how thry measure it
Is it illusion quantity
If sine is a ratio then the degree ia a ratio too

sine is a ratio formed by two sides of right triangle
right triange has angles at corners formed by pairs of sides
degree is the measure of the size of the angle at a corner
degrees can be directions too
like if north is 0 degrees then east is 90 degrees b/c east is a right-angle turn from north

So is sine same as degrees

no
sine is related b/c any right triangle with one angle with x degrees means other angle is 90-x degrees
all right triangles with angle sized x degrees are similar
since triangles are similar then ratios reduce to same values

What if the degree is 25 or 170 or 35? What will happen

what do you mean by something 'happening'?