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# Trigonometry Forum

Trigonometry Help Forum: Graphing trig expressions, identities, angles, applied questions

1. ### Why this equation is true? Can someone explain?

• Replies: 4
• Views: 301
Aug 7th 2019, 02:45 PM
2. ### I have clock hands using trig, is it possible to make the arrows at the ends as well

• Replies: 1
• Views: 399
Jun 6th 2019, 03:04 PM
3. ### How can I find the solutions of tan(x)=1?

• Replies: 5
• Views: 462
May 15th 2019, 06:25 AM
4. ### Why is the function called "secant"

• Replies: 1
• Views: 185
May 8th 2019, 01:04 PM
5. ### Finding a Chord Length of a Circle if I have Arc Length and Height?

• Replies: 3
• Views: 320
May 7th 2019, 01:35 AM
6. ### Solving Trigonometric Equations

• Replies: 2
• Views: 3,350
Mar 22nd 2019, 12:13 PM
7. ### Trigonometry: Displacement, Frequency, Position, and Ocillation

• Replies: 6
• Views: 6,161
Mar 21st 2019, 04:41 PM
8. ### inverse trigonometric function

• Replies: 2
• Views: 3,212
Mar 13th 2019, 06:49 AM
9. ### Why is cot(t) not= tan^-1(t)?

• Replies: 9
• Views: 312
Mar 12th 2019, 06:12 AM
10. ### Paying $5 need a few questions solved • Replies: 1 • Views: 330 Mar 4th 2019, 09:37 PM 11. ### Length of the angle bisector • Replies: 0 • Views: 287 Feb 28th 2019, 11:26 PM 12. ### One more interesting identity • Replies: 0 • Views: 343 Feb 25th 2019, 08:55 AM 13. ### One interesting formua • Replies: 3 • Views: 369 Feb 24th 2019, 12:02 PM 14. ### Trigonometry Question help (sine and cosine stuff) • Replies: 3 • Views: 368 Feb 11th 2019, 09:58 AM 15. ### I need help justifying a quotient of two trig functions • Replies: 1 • Views: 321 Feb 8th 2019, 10:39 PM 16. ### Harmonic Identities Help • Replies: 6 • Views: 640 Jan 27th 2019, 11:50 PM 17. ### octagon? • Replies: 3 • Views: 365 Jan 26th 2019, 03:56 PM 18. ### Some things for triangle with \alpha=2\beta$

• Replies: 0
• Views: 365
Jan 23rd 2019, 07:17 AM
19. ### When theta must be positive and when negative

• Replies: 5
• Views: 660
Jan 15th 2019, 04:11 PM
20. ### Cant solve If 𝑓(𝜃) = 2sin𝜃 − 𝑠𝑖𝑛 (𝜃/2) then find 𝑓(𝜋/3).

• Replies: 2
• Views: 575
Jan 4th 2019, 04:00 AM

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# how to provr a point is co planar

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