SOLUTION: The x-direction cosine of a line is -5/13 and the y-direction cosine, c2, is positive. What is c2? Please help.

SOLUTION: The x-direction cosine of a line is -5/13 and the y-direction cosine, c2, is positive. What is c2? Please help.

Algebra.Com

Question 256629: The x-direction cosine of a line is -5/13 and the y-direction cosine, c2, is positive. What is c2?
Please help.
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
If the x direction of cosine is -5/13, then we have 2 options for the y direction. The y direction is called sine not cosine.
cos(x) = -5/13
sin(x) = +-12/13
sin^2(x) = 144/169.
I hope that is what you wanted.
RELATED QUESTIONS
angles are measured from the positive horizontal axis, and the positive direction is... (answered by lwsshak3)

Q.1) If a, b, c, are real numbers such that a2+2b=6, b2+4c= -7 and c2+6a= -13, then the... (answered by Edwin McCravy)

What is cosine inverse of 112/13? (answered by Alan3354)

What is the slope of the... (answered by Alan3354)

Mckenzie and Cara both tried to find the missing side of the right triangle. A right... (answered by Alan3354,ikleyn)

in the expansion of (1+x)^n where n is a positive integer, and the binomial coefficients... (answered by ikleyn)

Find the magnitude and direction cosine of vector A, B, C, (A+B) (answered by Fombitz)

How to calculate a 3% solution (of 1000mls) from a 93% stock (of 100mls). I have tried (answered by TimothyLamb,josgarithmetic)

What is the value of the expression below when a is 3, b is 25, and c is 5?... (answered by ikleyn)