please show steps.

4. use an inverse trigonometric function to find the exact solutions of fre given equaton on the given interval. g in O a . cos b. cos cos 6 30 6 5 6 d. No Solution covered current section 5. use an inverse trigonometric function to find the exact solutions of fre given equaton on the given interval. 2 tan2t 4 tan t O a. tan- 3 = 0, tin 2 tan (-1 b. tan-I (Vi) d. No Solution Topic covered current section