Friday

March 27, 2015

March 27, 2015

Posted by **tabby** on Friday, April 20, 2012 at 7:41pm.

3 = r cos (theta - 315)

in rectangular form.

- Polar equations -
**ram**, Saturday, March 23, 2013 at 12:50am3=r cos(a-315)

where theta=a

now 315=360-45=2pi-pi/4=-pi/4

therefore, -315=+pi/4

therefore,3=r cos(a-315)becomes

3=r cos(a+pi/4)

but cos(a+pi/4)= cosa*cospi/4 - sina*sinpi/4

- Polar equations -
**ram**, Saturday, March 23, 2013 at 12:55am3=r cos(a-315)

where theta=a

now 315=360-45=2pi-pi/4=-pi/4

therefore, -315=+pi/4

therefore,3=r cos(a-315)becomes

3=r cos(a+pi/4)

but cos(a+pi/4)= cosa*cospi/4 - sina*sinpi/4

= 1/root2(cosa-sina)

3= 1/root2(rcosa-rsina)

= 1/root2 (x-y)

3root2=x-y

y = x-3root2 is an equation of line

**Answer this Question**

**Related Questions**

Pre-calculus; urgent ! Please help ! - 1.Graph the polar equation r=3-2sin(theta...

Calculus please help ! - 1.Graph the polar equation r=3-2sin(theta) 2. Find the ...

Math ! Please Help ! - 1.Graph the polar equation r=3-2sin(theta) 2. Find the ...

Pre-calculus HELP PLASE ! - 1.Write the rectangular equation in polar form. (x...

Math HELP PLEASE! QUICK! - 1.Write the rectangular equation in polar form. (x – ...

Polar to Rectangular Form - The letters r and theta represent polar coordinates...

calculus - for what value of r=4sinč have vertical tangent? In polar coordinates...

PRECALCULUS HELP PLEASE! - convert the polar equation to rectangular form. 1.) ...

math - put these polar equations into cartesians form: 1) theta=135 degrees 2)...

PRECALCULUS - convert the polar equation to rectangular form. 1.) r sec(theta...