(1) \(\sin\dfrac{\pi}{6}\)  (2) \(\cos\dfrac{\pi}{3}\)  (3) \(\tan\dfrac{\pi}{4}\)

(4) \(\cos\dfrac{5}{6}\pi\)  (5) \(\tan\dfrac{2}{3}\pi\)  (6) \(\sin\dfrac{3}{4}\pi\)

(7) \(\tan\dfrac{7}{6}\pi\)  (8) \(\sin\dfrac{4}{3}\pi\)  (9) \(\cos\dfrac{5}{4}\pi\)

(10) \(\sin\dfrac{11}{6}\pi\)  (11) \(\cos\dfrac{5}{3}\pi\)  (12) \(\tan\dfrac{7}{4}\pi\)

(13) \(\cos\left(-\dfrac{\pi}{6}\right)\)  (14) \(\tan\left(-\dfrac{\pi}{3}\right)\)  (15) \(\sin\left(-\dfrac{\pi}{4}\right)\)

(16) \(\tan\left(-\dfrac{5}{6}\pi\right)\)  (17) \(\sin\dfrac{7}{3}\pi\)  (18) \(\cos\dfrac{19}{4}\pi\)

(19) \(\sin\dfrac{\pi}{2}\)  (20) \(\cos\dfrac{3}{2}\pi\)  (21) \(\tan\pi\)

(22) \(\cos 0\)  (23) \(\tan (-\pi)\)  (24) \(\sin \pi\)

(25) \(\tan 5\pi\)  (26) \(\sin \dfrac{3}{2}\pi\)  (27) \(\cos \left(-\dfrac{\pi}{2}\right)\)