Right Triangle Inside Circle O

[nycmathguy]

Section 4.4

Let me see.

In Section 4.2, sin t = y and cos t = x.

My answer to part (a) is sin t = y and cos t = x.

Using the Pythagorean Theorem, I found r to be sqrt{x^2 + y^2}.

Using the definition of sine and cosine in this section, I found thefollowing:

sin (theta) = y/r

sin (theta) = y/[sqrt{x^2 + y^2}]

cos (theta) = x/r

cos (theta) = x/[sqrt{x^2 + y^2}]

I cannot answer part (d) without knowing if parts (a) and (c) are correct.

You say?

 

[MathLover1]

correct

 

[nycmathguy]

correct

Thank you. Happy to know that my answer in terms of parts (a) through (c) is right but I still don't know how to answer part (d). What conclusion can be stated based on my answer to parts (a) and (c)?

 

[nycmathguy]

correct

Thank you. Happy to know that my answer in terms of parts (a) through (c) is right but I still don't know how to answer part (d). What conclusion can be stated based on my answer to parts (a) and (c)?