1 / 3cos30 ° / 1 / 2sin45 ° + tan60 ° / cos30 °?

Jawapan:

# {6+ sqrt {6}} / 3 #

Penjelasan:

Oh myhosh, tidakkah mereka datang dengan masalah masalah yang tidak 30/60/90 atau 45/45/90?

# {1/3 cos 30 ^ circ} / {1/2 sin 45 ^ circ} + tan60 ^ circ / cos 30 ^ circ #

# = {2 cos 30 ^ circ} / {3 sin 45 ^ circ} + cot 30 ^ circ / cos 30 ^ circ #

# = {2 cos 30 ^ circ} / {3 sin 45 ^ circ} + {cos 30 ^ circ / sin 30 ^ circ} / cos 30 ^ circ #

# = {2 cos 30 ^ circ} / {3 sin 45 ^ circ} + 1 / sin 30 ^ circ #

# = 2 (sqrt {3} / 2) / (3 / sqrt {2}) + 1 / (1/2) #

# = 2 + sqrt {6} / 3 = {6+ sqrt {6}} / 3 #