Day 312: CDS Maths

5 questions (7 parts). Try each one first, then open its answer.

Question 1
Quadratic Equations. Asked once: CDS 1 2018
6 $px^2 + x + r = 0$
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Question 2
Surds, Indices and Simplification. Asked once: CDS 1 2017
1 $\sqrt{\dfrac{0.064 \times 6.25}{0.081 \times 4.84}}$
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Question 3
Triangles. Asked once: CDS 2 2022
69 $\angle EDF$
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Question 4 (case study, 3 parts)
Trigonometric Ratios and Identities. Asked once: CDS 2 2022
Consider the following for the next three (03) items that follow : A triangle ABC with sides AB = 15 cm, BC = 9 cm, CA = 12 cm is inscribed in a circle.
43 $\cos^2 A + \cos^2 B + \cos^2 C$
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44 $\sin^2 A + \sin^2 B + \sin^2 C$
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45 $What is the radius of the circle ?$
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Question 5
Algebraic Identities and Simplification. Asked once: CDS 1 2022
25 $x + \frac{1}{x} = \frac{5}{2}$
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Question 1