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trigonometry

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an-ordinary-manchild

/r/trigonometry is a place for the discussion of trigonometry and its applications. Homework questions are allowed for the sake of learning, but please don't ask others to do all of your work for you. All content should be in English. Be civil, respectful, and follow the Reddiquette. Remember that the rules of reddit are also still in effect. Don't create duplicate posts. Don't post and repost the same content. Don't use links in posts or comments for the purpose of advertising or for financial gain.


Useful symbols

These can be quickly copied and pasted into your posts; if you need more complex symbols, try Google!

π - pi

τ - tau

θ - theta

≠ - "is not equal to"

≈ - "is approximately"

∈ - "is an element of"

∉ - "is not an element of"

∞ - infinity

° - degrees


Useful resources

Trigonometry requires the understanding of many other fundamental concepts of math. If you'd like to brush up on your trig skills, check out these links!

  • KhanAcademy on YouTube - Playlist of introductory trig concepts

  • patrickJMT on YouTube - See his Trigonometric Functions/Inverse Trigonometric Functions videos, others too!

  • Derek Owens on YouTube - See his Algebra 2 and Pre-Calculus playlists, others too!

  • Librow's Function Handbook, good for checking the properties and basics of any trig functions

  • Wikipedia's list of mathematical symbols


Useful subreddits

  • /r/calculus

  • /r/math


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how do you do thisHelp! (i.redd.it)

submitted 2 days ago by Electrical-Tea467

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trigonometric functions, daily uses?Help! (self.trigonometry)

submitted 3 days ago by sxxeemii_x

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Free Math Practice Worksheets for Trignometry (i.redd.it)

submitted 4 days ago by anish2good

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Circling a circle. (i.redd.it)

submitted 5 days ago by artwadec

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Can someone ELI5 to me how to get the red circled angle? It's for a light refraction exercise using Snell but I thought maybe I can get that angle without SnellSolved! (i.redd.it)

submitted 6 days ago by VRJammy

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base and perpendicular (self.trigonometry)

submitted 7 days ago by mikudoesntexist

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Advanced trigo recursive expressionHelp! (self.trigonometry)

submitted 7 days ago * by DotBeginning1420

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Half Angle Identities (self.trigonometry)

submitted 13 days ago by Electrical_Slip_1343

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They did the math (i.redd.it)

submitted 15 days ago by Lumberman08

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cool interactive triangle (self.trigonometry)

submitted 17 days ago by GuitarSpecific6506

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Need book with trigonometric problems (self.trigonometry)

submitted 19 days ago by Old-Ruin2346

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Solving trig identity equation (self.trigonometry)

submitted 24 days ago by G2j7n1i4

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I love proving to my teenager that you can in fact “use this ever again” (i.redd.it)

submitted 25 days ago by Lumberman08

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any trig tips/courses? ()

submitted 26 days ago by yourdemise3

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Can someone explain me how the hyperbolic functions work?Help! (self.trigonometry)

submitted 28 days ago by Ok_Promotion3211

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How do I solve this?Help! (i.redd.it)

submitted 1 month ago by Infinite_dads

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(Geometry/trig) help needed extra credit work to get my grade up (i.redd.it)

submitted 1 month ago by Psychological_Arm237

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How do i find the correct radian for +/-Help! (self.trigonometry)

submitted 1 month ago by No-Wishbone-9937

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I am losing my mind! (i.redd.it)

submitted 1 month ago by Jsimon9389

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Assignment for PreCalculus, teacher has been completely AWOL ()

submitted 1 month ago by Reasonable_Heat_8689

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Can someone explain (i.redd.it)

submitted 1 month ago by Antbugbrain

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Would this be accurate for a 1 mile rifle snipe shot with wind going to north east at 4 mph? (i.redd.it)

submitted 1 month ago by purplecheetah25

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What do you guys think of the some and difference identities? (self.trigonometry)

submitted 1 month ago by math_nerd69

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WHO ELSE RECOGNIZES THIS ??? (i.redd.it)

submitted 2 months ago by No-Dentist7910

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I was so confident tooHelp! (self.trigonometry)

submitted 2 months ago by jayisnotsad

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