Thursday

December 18, 2014

December 18, 2014

Posted by **Jack** on Monday, September 5, 2011 at 5:03pm.

- PreCal -
**Reiny**, Monday, September 5, 2011 at 5:44pmP2(-4,-94°) can also be written a (4,94°)

Make a sketch to see that you have two straight lines with vertex at the origin of lenghts 3 and 4 with an angle of 79° between them.

by the cosine law:

(P1P2)^2 = 3^2 + 4^2 - 2(3)(4)cos 79°

= 20.42056

P1P2 = 4.519

- PreCal -
**Tim**, Monday, September 5, 2011 at 5:59pmThanks, I am understanding now.

**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 ...

trig - If sin(t) = -2/48 and cos(t) < 0 what is the value of cos(t) to the ...

algebra - solve 7^5x=23. round to the nearest ten-thousandth also solve in (4x +...

PreCal - A surveyor records the polar coordinates of the location of a landmark ...

Math - An airplane approaches a runway at a 3 degree angle of depresssion. If ...

Math - An airplane approaches a runway at a 3 degree angle of depresssion. If ...

tri - Points A and B are separated by a lake. To find the distance between them...

Algebra 1 - A boat travels 36 miles in 60 minutes. Find the unit rate. Round you...