The point P on the unit circle that corresponds to t= π/4 has coordinates (√2/2,√2/2). Thus, sin 4π/4=____ and tan π/4 =____ cos π/4=____
a. √2/2, 1, √2/2
b. 1/2, 1, 1/2
c. 1, √2, 1
d. √3/2, 1, √3/2