f = ......................................... −1(x) (3) (b) Solve fg(a) = 1 Show clear algebraic working. = ......................................... a (3) for Question 20 is 6 marks) ___________________________________________________________________________ The diagram shows a triangular prism with a horizontal base 21 ABCD. is the midpoint of M AD. The vertex is vertically V M. = 18 cm, = 10 cm, = 7 cm. DC BC MV Calculate the size of the angle between and the plane VC ABCD. Give your answer correct to 3 significant figures.
f −1(x) = ......................................... (3) (b) Solve fg(a) = 1 Show clear algebraic working. a = ......................................... (3) for Question 20 is 6 marks) ___________________________________________________________________________ 21 The diagram shows a triangular prism with a horizontal base ABCD. M is the midpoint of AD. The vertex V is vertically M. DC = 18 cm, BC = 10 cm, MV = 7 cm. Calculate the size of the angle between VC and the plane ABCD. Give your answer correct to 3 significant figures.
igcse-9-1-maths-practice-paper-1.docx