Thursday

April 17, 2014

April 17, 2014

Posted by **Abbey(Please help)** on Friday, April 30, 2010 at 3:57pm.

(-1 , -3pi/4)

I do not understand.

- Math -
**Reiny**, Friday, April 30, 2010 at 5:49pmAre you more comfortable thinking in degrees?

-3π/4 radians = -135° ( clockwise)

-135 is coterminal with +225°

so we could write our point as

(-1,225°)

which is the same as (+1 , +45°)

so x = cos45/1 = √2/2

y = sin45/1 = √2/2

the point is (√2/2,√2/2)

- Math -
**Abbey(Please help)**, Friday, April 30, 2010 at 6:10pmThank You!

**Related Questions**

Math - A point in polar coordinates is given, Find the corresponding rectangular...

trig - Given the polar coordinates of a point, how do I find the rectangular ...

Math - The rectangular coordinates of a point are given. Find two sets of polar ...

TRIGONOMETRY - 3. The rectangular coordinates of a point are given. Find the ...

calc - Find the corresponding rectangular coordinates for the polar point (4...

Calc 2 - Find the corresponding rectangular coordinates for the polar point (4...

Physics - If the rectangular coordinates of a point are given by (4,y), and its ...

Trigonometry - 1)Find the polar coordinates of the point whose rectangular ...

Math - The rectangular coordinates of a point are given. Find two sets of polar ...

Math - The rectangular coordinates of a point are given. Find two sets of polar ...