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9. Solve problems that involve two and three right triangles
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ASTC rule in trigonometry (All Students Take Calculus)
What You'll Learn
Identify which trigonometric ratios are positive in each quadrant
Apply the ASTC rule using the mnemonic 'Add Sugar To Coffee'
Determine sign conventions for sine, cosine, and tangent across all four quadrants
Recognize that all trig ratios are positive in quadrant I, and only one in each of II, III, and IV
What You'll Practice
1
Memorizing which ratio is positive in each quadrant using ASTC
2
Determining the sign of sine, cosine, and tangent for angles in different quadrants
3
Applying the 'Add Sugar To Coffee' mnemonic to recall quadrant rules
Why This Matters
The ASTC rule is essential for solving trigonometric equations and evaluating trig functions at any angle. You'll use this quadrant sign convention constantly in precalculus, calculus, physics, and engineering to correctly determine positive and negative values.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
ASTC Rule
Trigonometry
Quadrants
Unit Circle
Sine
Cosine
Tangent
Sign Convention
MB Curriculum Aligned