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# Trigonometry Forum

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

1. ### When theta must be positive and when negative

• Replies: 5
• Views: 185
Jan 15th 2019, 05:11 PM
2. ### Cant solve If 𝑓(𝜃) = 2sin𝜃 − 𝑠𝑖𝑛 (𝜃/2) then find 𝑓(𝜋/3).

• Replies: 2
• Views: 295
Jan 4th 2019, 05:00 AM

• Replies: 2
• Views: 284
Dec 29th 2018, 08:40 PM
4. ### Trigonometric identity

• Replies: 1
• Views: 318
Dec 8th 2018, 11:59 AM

• Replies: 4
• Views: 445
Dec 7th 2018, 12:48 PM
6. ### Diameter of a circle

• Replies: 0
• Views: 152
Dec 1st 2018, 12:28 AM
7. ### Transformations of Trigonometric Functions

• Replies: 5
• Views: 304
Nov 17th 2018, 04:00 PM
8. ### Need help with simple trig proof

• Replies: 1
• Views: 486
Nov 12th 2018, 02:39 PM

• Replies: 2
• Views: 391
Oct 18th 2018, 02:31 AM
10. ### How do I get the length and width given the diagonal line and ratio?

• Replies: 1
• Views: 267
Oct 17th 2018, 02:39 PM
11. ### sin(x - pi/3) = 0

• Replies: 3
• Views: 401
Oct 7th 2018, 08:23 AM

• Replies: 2
• Views: 319
Oct 6th 2018, 08:45 PM
13. ### 3tanx + 2cosx = 0 Solving for x but confused

• Replies: 3
• Views: 679
Sep 25th 2018, 10:12 AM
14. ### Help needed (gr.12 trig)

• Replies: 1
• Views: 321
Sep 19th 2018, 03:24 AM

• Replies: 1
• Views: 508
Sep 18th 2018, 03:59 PM
16. ### Hi some trig help please

• Replies: 1
• Views: 269
Sep 18th 2018, 03:49 PM
17. ### convergent equation

• Replies: 1
• Views: 301
Sep 13th 2018, 11:41 AM
18. ### trig word problem (grade 12 applied math)

• Replies: 2
• Views: 405
Sep 13th 2018, 11:05 AM
19. ### Need help with trigonometry and exact values

• Replies: 2
• Views: 372
Aug 16th 2018, 07:58 AM
20. ### Trigonometry of effective wind from yaw angle (see link)

• Replies: 3
• Views: 749
Aug 14th 2018, 11:43 PM

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# how to provr a point is co planar

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