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3.5 Trigonometry (A-level only)

3.5 Trigonometry (A-level only)

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Question 133
57%

The track of a high-precision robot follows a straight line l1l_1l1​ with equation x+4y=32x + 4y = 32x+4y=32. The line l1l_1l1​ intersects the yyy-axis at the point CCC.

a.

State the yyy-coordinate of CCC.

[1]
b.

The point D(8,6)D(8, 6)D(8,6) lies on l1l_1l1​. The line l2l_2l2​ passes through DDD and is perpendicular to l1l_1l1​. The line l2l_2l2​ intersects the yyy-axis at the point EEE.

Show that the yyy-coordinate of EEE is −26-26−26.

[3]
c.

A circular cleaning region BCEBCEBCE, which is a sector of a circle with centre CCC, is used by the robot. Given that angle BCEBCEBCE is 0.80.80.8 radians,

find the length of the arc BEBEBE.

[2]
d.

The total operational area CBEDCBEDCBED consists of the sector BCEBCEBCE joined to the triangle CDECDECDE.

Calculate the exact area of the region CBEDCBEDCBED.

[3]
Markscheme

3.5 Trigonometry (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.5 Trigonometry (A-level only)

225 exam-style questions on WJEC A Level Maths 3.5 Trigonometry (A-level only), covering 3.5.1 Trigonometry (A-level only), 3.5.2 Trigonometry (A-level only), 3.5.3 Trigonometry (A-level only), 3.5.4 Trigonometry (A-level only), 3.5.5 Trigonometry (A-level only), 3.5.6 Trigonometry (A-level only), 3.5.7 Trigonometry (A-level only), and 3.5.8 Trigonometry (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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