SOLUTION: Show how they equal. cos 90 degrees= square root 1 + cos 180 degrees/ 2 PLEASE HELP ME OUT

SOLUTION: Show how they equal. cos 90 degrees= square root 1 + cos 180 degrees/ 2 PLEASE HELP ME OUT

Algebra.Com

Question 181072: Show how they equal.
cos 90 degrees= square root 1 + cos 180 degrees/ 2
PLEASE HELP ME OUT

Answer by eperette(173) (Show Source): You can put this solution on YOUR website!
THINGS YOU MUST KNOW
cos90=0
cos180=-1
cos90= sqr(1 + cos180)/2
0 = sqr (1 + (-1))/2
0 = sqr (0)/2
0= 0/2
0=0
RELATED QUESTIONS
Show how both sides equal. sin 45 degrees= Square root 1-cos 90 degrees/2. PLEASE... (answered by eperette)

Show how both sides equal. 2 cos^2 30 degrees-1 = cos 60... (answered by eperette)

please help me solve my homework: simplify: sin(90degrees+ x) sin ( 180 degrees +x) + cos (answered by stanbon)

Show that the values are equal. 1-2 sin^2 30 degrees= cos 60... (answered by eperette)

Please help me with this! If: z=4(cos 50 degrees + i sin 50 degrees) and w=2(cos 340... (answered by Edwin McCravy)

This problem is really difficult, I just can't seem to figure it out. Will someone PLEASE (answered by Edwin McCravy)

Please help me figure this out: sec^2 180... (answered by Fombitz,josmiceli)

please help me with my homework: using exact values, verify that cos 60 degrees = 1 - 2 (answered by stanbon)

Please help me write (3-2i) in polar form. Here are the choices: 1. sqrt13(cos 33.7... (answered by Fombitz)