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Algebra and Trigonometry page no 476

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find the point (x, y) on the unit circle that corresponds to the real number .Use the result to evaluate sin t , cos t and tan t.

asked Mar 5, 2014 in TRIGONOMETRY by mathgirl Apprentice

1 Answer

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A circle with radius 1 and cetered at the origin is called unit circle.

Equation of the unit circle is in the form image.

The coordinates of every point on the unit circle is in the form image.

Point imagecorresponding to the real number image is

image

image

Point image

image

Now find using the point image

image

image

image

So, Point image and image, image, image,

answered Apr 12, 2014 by Johncena Apprentice

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