Trigonometric Identities, part 2 of 2

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The Commander-in-TEACH returns for his second term on trigonometric identities, aka trig identities. Here, we dive into it hard, covering more complex examples. We use factoring, common denominators, and algebra skills for simplifying trig expressions. We revisit pythagorean identities and discuss quadrants as well. Enjoy the vibes, YAY MATH!