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Quoted By: >>1520107
I'm trying to re-learn high-school math, and I've stumbled onto something I'm confused by.
It's not even about what the exercise is about, it's a "worked example", it literally goes step by step to explain how to solve it.
What I can't wrap my head around is how they got the length of AB. If it were me, I'd figure out the angle C (180 degrees, or π rad, minus 2*0.9 rad, since it's isosceles), and then use the Cosine Rule to calculate the length. But it doesn't look like that's what the example did, unless I'm missing something. So what the hell did they do?
They might explain it later on, since Trigonometry itself is next chapter, so far I'm drawing a blank.
It's not even about what the exercise is about, it's a "worked example", it literally goes step by step to explain how to solve it.
What I can't wrap my head around is how they got the length of AB. If it were me, I'd figure out the angle C (180 degrees, or π rad, minus 2*0.9 rad, since it's isosceles), and then use the Cosine Rule to calculate the length. But it doesn't look like that's what the example did, unless I'm missing something. So what the hell did they do?
They might explain it later on, since Trigonometry itself is next chapter, so far I'm drawing a blank.
