Activity Sheet 4. Complete the table for the trigonometric ratios of special angles. 30' 60 sin COS tan sec CSC Activity 5. Evaluate the following expressions. 1. Cos 30"-sec60* 6. 3tan? 60"+ 2csc 245" -Stan 45" 2. Tan45 +sin30'-csc30" 7. 2[(cos 30")(csc 60")- (sec 45")(sin 45*)] 3. (Cos45 )(cos45*)+(sec60*)(cos60") 8. (cos 60")(cos 45")+(sin 60")(sin 45") 4. (Cot30*)(tan60") tan 60 sec 45 9. cos 60-cot 45 sin 30-tan45 5 (Ser245")+(ent245")-tan245* 10 tan 30'(sin30'+ent30'en