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x =12. 2Findthegradientofthecurvewhen x +arctan y = π 1.(5points)Considerthecurvegivenbytheequation:arcsin BatoryAAHLShortTest10May29,2020Name:

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Batory AA HL Short Test 10 May 29, 2020

Name:

1. (5 points) Consider the curve given by the equation:

arcsin x + arctan y = π 2 Find the gradient of the curve when x = 1

2.

(2)

Batory AA HL Short Test 10, page 2 of 4 May 29, 2020

2. (5 points) Consider the tangent to the graph of y = 1

x at x = a for a > 0.

Show that the area of the triangle enclosed by this tangent and the axes is independent of a and calculate this area.

(3)

Batory AA HL Short Test 10, page 3 of 4 May 29, 2020

3. (5 points) (a) Show that

sin(arccos x) =

1 − x2

(b) Show that

sin(2 arccos x) = 2x√

1 − x2

(c) Hence or otherwise solve:

sin(arccos x) = sin(2 arccos x)

(4)

Batory AA HL Short Test 10, page 4 of 4 May 29, 2020

4. (5 points) Consider the polynomial equation:

2x3 + Ax2 + Bx + C = 0 1

2 and 2 + 3i are solutions to this equation.

(a) Write down the third solution.

(b) Find A, B and C.

(c) Find solutions to the equation:

2 + Ax + Bx2 + Cx3 = 0

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