Wy must cosine X be -1 or less than 1.the part abt less than 1 i geddit.but the part about how it cannot be less than -1 ,i dont geddit:O
Help by explaining why cosine and sine cannot be less than -1 and why -1?
Help by explaining why cosine and sine cannot be less than -1 and why -1?
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on a unit circle, cos = x, where x^2 + y^2 = 1
the extreme values of x are +/- 1, when y = 0
rearranging the equation of the circle, x = +/- sqrt(1 - y^2)
so -1 <= x <= 1
the extreme values of x are +/- 1, when y = 0
rearranging the equation of the circle, x = +/- sqrt(1 - y^2)
so -1 <= x <= 1
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Have you seen the unit circle?
http://www.google.com/imgres?um=1&hl=en&…
It only has a radius of one.
If it has a radius of one, then we are bounded between -1 and 1
http://www.google.com/imgres?um=1&hl=en&…
It only has a radius of one.
If it has a radius of one, then we are bounded between -1 and 1