body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

6. The Law of Sines and Law of Cosines

Continue to next subchapter

Exercise 70 Page 679

Notice that P is on the x-axis and that the triangle is a right isosceles triangle.

N(0,2a)

Practice makes perfect

Notice that △ KJN is a right isosceles triangle, where NJ=JK.

Since N is on the y-axis, its x-coordinate is 0. Additionally, since NJ=JK and JK=2a, it must be that NJ=2a. Therefore, the y-coordinate of N is equal to 2a.

Subchapter links

Exercises p.674-679