The equations of the lines tangent to the cricle x squared + y sqaured = 25 that have no slopes are ____.?

0 ⤊

a. x = + 5
b. x = + 25
c. y = + 5
d. y = + 25

all the plus signs have like an underline. (:
solutions please. thanks! (:

2007-05-23 00:25:31 · 3 answers · asked by Ocean Princess 1 in Science & Mathematics ➔ Mathematics

The answer is a. x = ± 5.

No slope means the slope is undefined. It does not mean the slope is zero.

By the way, ± means plus or minus.

2007-05-23 15:29:37 · answer #1 · answered by Northstar 7 · 0⤊ 0⤋

radius = 5
so tangent with 0 slope is y=5

2007-05-23 07:28:48 · answer #2 · answered by solver 3 · 0⤊ 1⤋

slope= -x/y.
since the slope is 0.
therefore equ of tangent will be y=5.

2007-05-23 07:44:42 · answer #3 · answered by anna 1 · 0⤊ 1⤋