Find the principal axis of:

PHYSICS · Multi-part · ISC · Mathematics · Physics · Algebra (Matrices and Determinants)

Problem

Find the principal axis of: (a) y=−13sin⁡(x−π4)+5y = -\frac{1}{3} \sin\left(x - \frac{\pi}{4}\right) + 5 (b) y=2cos⁡x3−4y = 2 \cos \frac{x}{3} - 4

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