SOLUTION: if cos x = squareroot of 2 over 2 in which quadrants could angle x terminate only one 2 has the square root

Question 906371: if cos x = squareroot of 2 over 2 in which quadrants could angle x terminate only one 2 has the square root
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if cos x = squareroot of 2 over 2 in which quadrants could angle x terminate only one 2 has the square root
-----
Note: sqrt(2)/2 is a positive number.
-----
By devinition, cosine = x/r
r is always positive because r = sqrt(x^2+y^2)
So cos is positive when x is positive.
x is positive in QI and in QIV
---
Ans: the angle must terminate in QI or in QIV.
----------------
Cheers,
Stan H.
---------------
RELATED QUESTIONS
If tan x = - (the square root of 3) in which quadrants could angle x terminate (answered by Alan3354)

Is square root 1 minus sine squared theta = cos Θ true? If so, in which quadrants... (answered by Fombitz)

If tan x= -RADICAL 3, in which quadrants could angle x terminate? A. II and III B. I... (answered by stanbon)

Solve the radical equation and explain how you got the answer: (squareroot symbol over... (answered by Alan3354)

I need help with a very difficult math assignment i have recieved my math teachers makes... (answered by drk,stanbon)

If h (x) = a x 2 + bx + c, where b 2 - 4ac < 0 and a < 0, which of the following... (answered by Theo)

Find all solutions if 0 ≤ x < 2π. Use exact values only. (Enter your... (answered by lwsshak3)

A triangle has sides of squareroot of 2 and 3. Which could not be the length of the... (answered by stanbon)

The graph of the equation y=(1/2)^x lies in which... (answered by reviewermath)