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NECO Mathematics · Trigonometry

Sine, Cosine and Tangent of an angle: NECO Mathematics Past Questions and Answers

What the WAEC syllabus covers in Sine, Cosine and Tangent of an angle

Our summary: The three basic trig ratios, their values for common angles and their graphs.

  • Sine, Cosine and Tangent of acute angles
  • Use of tables of trigonometric ratios
  • Trigonometric ratios of 30°, 45° and 60°
  • Sine, cosine and tangent of angles from 0° to 360°
  • Graphs of sine and cosine
  • Graphs of trigonometric ratios

Syllabus content © The West African Examinations Council (WASSCE (harmonised West African syllabus)). NECO questions are matched to the WAEC syllabus topic.

NECO Mathematics questions on Sine, Cosine and Tangent of an angle

  1. NECO 2008Find y if sin y = cos 48°
  2. NECO 2008Two ladders of length 5m and 7m lean against a pole and make angles 45° and 60° with the ground respectively. What is their distance apart on the pole correct…
  3. NECO 2008If tan α = 1/2 and tan β = 1/3 and both α and β are acute, find tan (α + β).
  4. NECO 2005In Δ ABC, A = 60°, C = 90° and AC = 12m. Find the Length of the hypotenuse.
  5. NECO 2005Calculate without using tables Tan 45° + Cos 60°
  6. NECO 2004If cos x = 4/5, 0° x 90°, find the value of (1 + tan x)/(1 - tan x)
  7. NECO 2004Two angles of a triangle are 45º each and its longest side is 12cm. Find the length of one of the other sides
  8. NECO 2002If sin 30° = 0.5, what is the cosine of its complement?
  9. NECO 2002The angle of elevation of the top (T) of a palm tree from a point (R) on the ground is 30°. The distance from R to the base (B) of the palm tree is 120m. What…
  10. NECO 2001If sin θ = 4/5 where 0° ∠ θ ∠ 90º, what is the value of cos θ + tan θ?
  11. NECO 2001In an acute angle-triangle XYZ, XZ = 9cm, YZ = 11cm and ∠XZY = 35° Calculate ∠YXZ, correct to the nearest degree.
  12. NECO 2001If cos x = - 5/13 where 180° < X < 270°, what is the value of tan x -sin x ?

Years with Sine, Cosine and Tangent of an angle questions in DeeepSolve's question bank

From the past questions DeeepSolve holds, not a count of everything the exam body has set.

  • 2008
  • 2005
  • 2004
  • 2002
  • 2001
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