Question

19. (4)
( frac{sin 39^{circ}}{cos 51^{circ}}+2 tan 11^{circ} cdot tan 31^{circ} )
( tan 45^{circ} cdot tan 59^{circ} cdot tan 79^{circ}-3 )

# COS 519 19. The value of sin 39° 70 + 2tan 11° tan 31° tan45° tan59° tan79° - 3 (sinº21° + sin?699) is (1) 1 (2) 2 (3)-1 (4) O

Solution