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Trigonometry

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Trigonometric Ratios (Sine, Cosine, Tangent)

Subtopic

Trigonometric Ratios (Sine, Cosine, Tangent) under Trigonometry for Grade 8 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the common acronym used to remember the primary trigonometric ratios?

    A.

    PEMDAS

    B.

    SOH CAH TOA

    C.

    FOIL

    D.

    ROYGBIV

  2. 2.

    If sin⁡(x)=1517\sin(x) = \frac{15}{17}, what is xx to the nearest degree?

    A.

    62∘62^{\circ}

    B.

    28∘28^{\circ}

    C.

    45∘45^{\circ}

    D.

    90∘90^{\circ}

  3. 3.

    If tan⁡(x)=512\tan(x) = \frac{5}{12}, what is xx to the nearest degree?

    A.

    25∘25^{\circ}

    B.

    67∘67^{\circ}

    C.

    23∘23^{\circ}

    D.

    45∘45^{\circ}

Download the worksheet for Trigonometry - Trigonometric Ratios (Sine, Cosine, Tangent) to practice offline. It includes additional chapter-level practice questions.

Calculating Sides and Angles in Right-Angled Triangles

Subtopic

Calculating Sides and Angles in Right-Angled Triangles under Trigonometry for Grade 8 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If tan⁡(θ)=34\tan(\theta) = \frac{3}{4}, find θ\theta to the nearest degree.

    A.

    37∘37^\circ

    B.

    53∘53^\circ

    C.

    36∘36^\circ

    D.

    41∘41^\circ

  2. 2.

    Calculate the hypotenuse of a triangle with an angle of 22∘22^\circ and an opposite side of 88.

    A.

    21.3521.35

    B.

    19.7919.79

    C.

    3.003.00

    D.

    21.3621.36

  3. 3.

    What is sin⁡(90∘)\sin(90^\circ)?

    A.

    00

    B.

    0.50.5

    C.

    11

    D.

    Undefined

Download the worksheet for Trigonometry - Calculating Sides and Angles in Right-Angled Triangles to practice offline. It includes additional chapter-level practice questions.