The terminal ray of angle β, drawn in standard position, passes through the point (−7, 23√).
What is the value of cosβ?
Enter your answer, in simplest radical form, in the box.
+36915
Is that point given (-7,\(\sqrt{23}\) ) ?? I will assume it is
Find hypoytenuse length of the terminal ray ( or magnitude)
= sqrt ( (-7)^2 + (sqrt23)^2 ) = sqrt (49 + 23) = sqrt 72
cos = -7 / sqrt (72) = - 7/ (6sqrt 2)
+36915
Is that point given (-7,\(\sqrt{23}\) ) ?? I will assume it is
Find hypoytenuse length of the terminal ray ( or magnitude)
= sqrt ( (-7)^2 + (sqrt23)^2 ) = sqrt (49 + 23) = sqrt 72
cos = -7 / sqrt (72) = - 7/ (6sqrt 2)
