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4. Communication. Explain where the CAST Rule comes from by showing how we can determine that: A) the Sine ratio is positive for angles drawn with terminal arms in the second quadrant, and B) the Tangent ratio is negative for angles drawn in the fourth quadrant.

4. Communication. Explain where the CAST Rule comes from by showing how we can determine that: A) the Sine ratio is positive for angles drawn with terminal arms in the second quadrant, and B) the Tangent ratio is negative for angles drawn in the fourth quadrant.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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4. Communication. Explain where the CAST Rule comes from by showing how we can determine that: A) the Sine ratio is positive for angles drawn with terminal arms in the second quadrant, and B) the Tangent ratio is negative for angles drawn in the fourth quadrant.
Transcribed Image Text:4. Communication. Explain where the CAST Rule comes from by showing how we can determine that: A) the Sine ratio is positive for angles drawn with terminal arms in the second quadrant, and B) the Tangent ratio is negative for angles drawn in the fourth quadrant.
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