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  • erplex

    Trig equations & identities

    60

    Practice Problems

    Work through our library of IB-style problems

    32

    Skills Checklist

    Track your progress on all skills in this unit

    Video Lessons

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    Lessons & Notes

    The Unit Circle

    Sine, cosine & tangent functions in the unit circle

    Start Lesson

    Trigonometric Functions

    Graphs, domain, and range of sinx and cosx, general sinusoidal functions, modeling periodic phenomena, tanx and reciprocal trig functions, inverse trig functions

    Start Lesson

    Reciprocal trig functions (Plus Only)

    The functions secx, cosecx and cotx, domain, range & graphs

    Upgrade to Plus

    Trig Equations(Plus Only)

    Solving equations involving trigonometric functions and understanding solution domains

    Upgrade to Plus

    Inverse trig functions(Plus Only)

    The functions arcsin,arccos and arctan, their domain & range & graph

    Upgrade to Plus

    Trigonometric Identities(Plus Only)

    Applications of trigonometric identities such as sin2θ+cos2θ=1, sin2θ=2sinθcosθ and more identities for HL students

    Upgrade to Plus

    Further trigonometric identities(Plus Only)

    Compound angle identities sin(A+B) and cos(A+B), double angle identity for tan2θ, and pythagorean identity for reciprocal trig functions.

    Upgrade to Plus

    Speed Run Quizzes

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    Practice Tests

    Comprehensive exams with detailed feedback

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    The Unit Circle

    Sine, cosine & tangent functions in the unit circle

    Start Lesson

    Trigonometric Functions

    Graphs, domain, and range of sinx and cosx, general sinusoidal functions, modeling periodic phenomena, tanx and reciprocal trig functions, inverse trig functions

    Start Lesson

    Reciprocal trig functions (Plus Only)

    The functions secx, cosecx and cotx, domain, range & graphs

    Upgrade to Plus

    Trig Equations(Plus Only)

    Solving equations involving trigonometric functions and understanding solution domains

    Upgrade to Plus

    Inverse trig functions(Plus Only)

    The functions arcsin,arccos and arctan, their domain & range & graph

    Upgrade to Plus

    Trigonometric Identities(Plus Only)

    Applications of trigonometric identities such as sin2θ+cos2θ=1, sin2θ=2sinθcosθ and more identities for HL students

    Upgrade to Plus

    Further trigonometric identities(Plus Only)

    Compound angle identities sin(A+B) and cos(A+B), double angle identity for tan2θ, and pythagorean identity for reciprocal trig functions.

    Upgrade to Plus