Evaluate: S 0 tan-1 (0) de O arctan(0) -0 N/O 2 arctan 0 + C O arctan (0)-0 0 2 2 arctan 0 + C O 02 -arctan 0 + 0-arctan (0) 2 2 + C O 02 2 -arctan 0 + arctan(0)-0 + C 2 Question 12 Evaluate: f csc3 28 cot3 2B dB O CSC 28 csc' 28 5 3 + C O csco 28 csc4 28 6 4 + C O CSC 28 csco 28 5 3 + C O csco 28 csc4 28 6 4 + C