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Unit 1: Right triangles & trigonometry

About this unit.

Can you find the length of a missing side of a right triangle? You most likely can: if you are given two side lengths you can use the Pythagorean Theorem to find the third one. But, what if you are only given one side? Impossible? Cue sine, cosine, and tangent, which will help you solve for any side or any angle of a right triangle.

Ratios in right triangles

  • Getting ready for right triangles and trigonometry (Opens a modal)
  • Hypotenuse, opposite, and adjacent (Opens a modal)
  • Side ratios in right triangles as a function of the angles (Opens a modal)
  • Using similarity to estimate ratio between side lengths (Opens a modal)
  • Using right triangle ratios to approximate angle measure (Opens a modal)
  • Right triangles & trigonometry: FAQ (Opens a modal)
  • Use ratios in right triangles Get 3 of 4 questions to level up!

Introduction to the trigonometric ratios

  • Triangle similarity & the trigonometric ratios (Opens a modal)
  • Trigonometric ratios in right triangles (Opens a modal)
  • Trigonometric ratios in right triangles Get 3 of 4 questions to level up!

Solving for a side in a right triangle using the trigonometric ratios

  • Solving for a side in right triangles with trigonometry (Opens a modal)
  • Solve for a side in right triangles Get 3 of 4 questions to level up!

Solving for an angle in a right triangle using the trigonometric ratios

  • Intro to inverse trig functions (Opens a modal)
  • Solve for an angle in right triangles Get 3 of 4 questions to level up!

Sine and cosine of complementary angles

  • Intro to the Pythagorean trig identity (Opens a modal)
  • Sine & cosine of complementary angles (Opens a modal)
  • Using complementary angles (Opens a modal)
  • Trig word problem: complementary angles (Opens a modal)
  • Trig challenge problem: trig values & side ratios (Opens a modal)
  • Trig ratios of special triangles (Opens a modal)
  • Relate ratios in right triangles Get 3 of 4 questions to level up!

Modeling with right triangles

  • Right triangle word problem (Opens a modal)
  • Angles of elevation and depression (Opens a modal)
  • Right triangle trigonometry review (Opens a modal)
  • Right triangle trigonometry word problems Get 3 of 4 questions to level up!

The reciprocal trigonometric ratios

  • Reciprocal trig ratios (Opens a modal)
  • Finding reciprocal trig ratios (Opens a modal)
  • Using reciprocal trig ratios (Opens a modal)
  • Trigonometric ratios review (Opens a modal)
  • Reciprocal trig ratios Get 5 of 7 questions to level up!

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COMMENTS

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