Home > PC3 > Chapter 4 > Lesson 4.2.1 > Problem 4-61
4-61.
If
This angle is in Quadrant III. Should
Evaluate
. Evaluate
. If α is another angle with the same sine as
, but a different cosine, in what quadrant is ? For
, sine and cosine are both negative.
In what quadrant is sine negative and cosine positive?If
is another angle with the same cosine as , but a different sine, in what quadrant is ? For
, sine and cosine are both negative.
In what quadrant is sine positive and cosine negative?