4th quadrant is positive x (cos) and negative y (sin)
Use the Pythagorean Theorem to calculate the value of y (sin).
x² + y² = c²
5² + y² = 13²
25 + y² = 169
y² = 144
y = 12
Since the y-value is negative in the 4th quadrant, then y = -12
For example, 3/5.
3/5 = 0.6.
1/2 = 0.5
2/3 = 0.6666
0.5 -- 0.6 -- 0.66666666
As, v=√2as
Squaring both sides,
v²=2as
∴ s= v²/2a
B. <span>She is correct. The remaining angle of the triangle measures less than 90 degrees.</span>
The area of a square would be = A= a²
