Expressed as a function of an acute angle, `cos310^(@)`=

Express cos 320^(@) as a function of an angle between 0^(@) and 90^(@) I. cos40^(@) II. sin50^(@) III. cos50^(@)

Express the following as functions of angles less than 45^(@) : cos189^(@)

Angle of 0^(@) is an acute angle.

Express the following as trigonometric ratios of some acute angles. cos 500^@

Express the following as trigonometric ratios of some acute angles. cosec (-60^@)

Express the following as trigonometric ratios of some acute angles. sec 380^@

Express the following as trigonometric ratios of some acute angles. cot (-3888^@)

Express 310 in roman numerals.