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 'Trigonometry problem of interest'

Seemingly by some mathematical coincidence, a hexagon of sides 2,2,7,7, 11, and 11 can be inscribed in a circle of radius 7. The other day I saw a math problem on line, which they said came from a Polish Olympiad, where you compute the length x of the 3rd side which is the same as the radius, so that the sides of length 2,x, and 11 are inscribed on the arc of a semi-circle. The law of cosines applied twice gives the answer for x of exactly 7, but the arithmetic is so complex that the...
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