Trigonometry Forum

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

1. help with equation of a sinusodial equation

• Replies: 1
• Views: 779
Apr 7th 2010, 11:52 PM
2. partially filled ellipsoidl horizontal tank volume

• Replies: 0
• Views: 1,202
Apr 7th 2010, 06:33 PM
3. [SOLVED] Cosine of the Sum of Two Angles

• Replies: 7
• Views: 654
Apr 7th 2010, 04:14 PM
4. prove this identity (with add and subtract formulas)

• Replies: 2
• Views: 669
Apr 7th 2010, 01:15 PM
5. Can someone help me prove these two identities?

• Replies: 5
• Views: 760
Apr 7th 2010, 12:48 PM
6. Brainfog on Identity

• Replies: 2
• Views: 372
Apr 7th 2010, 09:11 AM
7. Trigonometric "transformation"?

• Replies: 1
• Views: 350
Apr 7th 2010, 08:16 AM
8. Exact values of sin20 and sin40 - impossible?

• Replies: 2
• Views: 3,759
Apr 6th 2010, 11:11 PM
9. Writing a formula from a circle and triangle

• Replies: 3
• Views: 606
Apr 6th 2010, 10:25 PM
10. Sin and Cos question

• Replies: 1
• Views: 361
Apr 6th 2010, 04:49 PM
11. solve this trig equation

• Replies: 1
• Views: 530
Apr 6th 2010, 04:42 PM
12. Finding cos and sin from tan?

• Replies: 4
• Views: 635
Apr 6th 2010, 07:07 AM
13. Sine Law Word Problems, How to get these answers?

• Replies: 7
• Views: 1,299
Apr 5th 2010, 06:14 PM
14. Prove this identity?

• Replies: 5
• Views: 791
Apr 5th 2010, 05:29 PM
15. Trigonometry : Solving trigonometric functions

• Replies: 5
• Views: 451
Apr 5th 2010, 03:57 PM
16. Trig equations

• Replies: 5
• Views: 438
Apr 5th 2010, 10:02 AM
17. Rotation of a triangle

• Replies: 3
• Views: 2,854
Apr 5th 2010, 09:44 AM
18. Trig nd AP

• Replies: 3
• Views: 655
Apr 5th 2010, 06:18 AM

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20. Trigonometry Problem: Possibly Using the Ratios

• Replies: 2
• Views: 710
Apr 5th 2010, 12:28 AM
21. Proving identities

• Replies: 1
• Views: 535
Apr 4th 2010, 08:19 PM
22. Reflecting a line in a plane

• Replies: 2
• Views: 656
Apr 4th 2010, 09:48 AM
23. tan identity

• Replies: 1
• Views: 712
Apr 4th 2010, 06:43 AM
24. trigo function

• Replies: 1
• Views: 576
Apr 4th 2010, 02:38 AM
25. Spheres

• Replies: 5
• Views: 614
Apr 4th 2010, 01:03 AM

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trigonometry sotr

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