8:18 AM G0 +234 901 970 2349 August 15, 8:59 AM +94 UNIVERSITY OF ABUJA Faculty of Engineering B.Eng. (Chemical Engineering) CA Test FEG 221: Engineering Mathematics 11 Instruction Attempt all questions Second Semester 2022/2023 Session Date: 16 November 2023 Time allowed: 30 min 1. Given that represents the imaginary uni" for a complex number, what is the value of (1 mark) 2.Sich the amphical representation (Argand diagram) of 5- For vector -[3,0,4], find the Lach of the vector marks) (2 marks) (2 marks) H Unit vector in the direction P @marks) What is the cross product of vector(s) a-13-14) and 5-12.5.1) marks) 5. Given that U= If cosx- (2-2) (28-2) write the first four (4) terms of the series (4 marks) (Note: 01-1) , estimate cos 60", using the first four (4) terms of the series ||| = о marks) U ۲۲ 《

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