Which trigonometric expression has a negative? value? Pls help fast!!!
2 answers:
Answer:
B. sin(5pi/4)= -(sqr2/2)
Step-by-step explanation:
This is because its in the 3rd quadrant, meaning the coordinates will be ( - , - ).
Also if you want to think of it like this,
since pi/1 is equal to 180 degrees on the Unit Circle, you can consider 4 as 180 degrees, like this, 180/4=45, from this we can tell that "1" is equal to 45 degrees on the unit circle in this case. From this can we derive that 5 is 225 degrees around the Unit Circle, thus landing in the 3rd Quadrant.
*Use the attachment for reference.
You might be interested in