MHB What are the best resources for solving trigonometric equations and identities?

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For solving trigonometric equations and identities, users recommend utilizing resources like solved problems and comprehensive trig/pre-calculus textbooks. Engaging with textbooks allows for a structured approach, encouraging users to post questions as they progress. A specific resource shared is a link to a developed guide that helps streamline the learning process. These resources collectively support a better understanding of trigonometry. Effective study methods and community engagement are emphasized for mastering the subject.
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As per the guidelines, I've come here to ask if anyone knows of any good resources regarding trigonometry. Mainly solving equations and identities.
 
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There are a lot of solved problems here. If that's not what you're after, you could get a trig/pre-calculus textbook and work through it, posting any question you have along the way. :)
 
Also check out this https://mathhelpboards.com/threads/trigonometry-to-memorize-and-trigonometry-to-derive.35/ that I developed. It can narrow down your efforts considerably!
 

Thread 'Significant figures for inherently bound values'

I have been insisting to my statistics students that for probabilities, the rule is the number of significant figures is the number of digits past the leading zeros or leading nines. For example to give 4 significant figures for a probability: 0.000001234 and 0.99999991234 are the correct number of decimal places. That way the complementary probability can also be given to the same significant figures ( 0.999998766 and 0.00000008766 respectively). More generally if you have a value that...
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