# Trigonometry Forum

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

1. ### proving a trig identity

• Replies: 3
• Views: 608
Apr 17th 2009, 02:52 PM
2. ### Triangle

• Replies: 2
• Views: 373
Apr 16th 2009, 06:15 PM
3. ### Transforming a cosine graph.

• Replies: 3
• Views: 638
Apr 16th 2009, 05:26 PM

• Replies: 1
• Views: 1,720
Apr 16th 2009, 02:35 PM
5. ### Writing a Sin and Cos Function Equation

• Replies: 1
• Views: 795
Apr 16th 2009, 12:22 PM
6. ### Surrounding circles with rectangle

• Replies: 1
• Views: 800
Apr 16th 2009, 12:06 PM
7. ### [SOLVED] Sine/Cosine Addition Formulae

• Replies: 3
• Views: 657
Apr 16th 2009, 10:29 AM
8. ### simplify trig expression.

• Replies: 1
• Views: 577
Apr 16th 2009, 06:35 AM
9. ### Why do I need a coterminal angle for cos(-pi/2) for the unit circle?

• Replies: 2
• Views: 1,595
Apr 15th 2009, 05:07 PM
10. ### area of the triangle

• Replies: 1
• Views: 441
Apr 15th 2009, 05:07 PM
11. ### De Moivre's Theorem

• Replies: 3
• Views: 678
Apr 15th 2009, 01:43 PM
12. ### trig identities, proof

• Replies: 5
• Views: 783
Apr 15th 2009, 01:26 PM
13. ### Powers of complex numbers

• Replies: 3
• Views: 554
Apr 15th 2009, 11:59 AM
14. ### Law of cosine and sine

• Replies: 1
• Views: 582
Apr 15th 2009, 11:39 AM
15. ### Word problem including depth, min / max..

• Replies: 1
• Views: 961
Apr 15th 2009, 10:16 AM
16. ### Need Help In These word problems

• Replies: 3
• Views: 1,671
Apr 15th 2009, 07:42 AM
17. ### help: solving equation (cos^2x)(sin^2x)=0

• Replies: 4
• Views: 508
Apr 15th 2009, 05:40 AM
18. ### Domain and Range of Sine Function

• Replies: 7
• Views: 2,604
Apr 14th 2009, 06:24 PM
19. ### trigo proving.....

• Replies: 1
• Views: 456
Apr 14th 2009, 01:58 AM
20. ### Writing a Complex Number in Trigonometric Form

• Replies: 5
• Views: 2,366
Apr 13th 2009, 06:02 PM
21. ### Trig Identity

• Replies: 7
• Views: 506
Apr 13th 2009, 02:50 PM
22. ### Values of tan

• Replies: 1
• Views: 517
Apr 13th 2009, 11:55 AM
23. ### right triangle's hypotenuse

• Replies: 1
• Views: 632
Apr 13th 2009, 09:29 AM
24. ### simple trig

• Replies: 3
• Views: 656
Apr 13th 2009, 07:09 AM
25. ### Canceling out and trig identities

• Replies: 8
• Views: 859
Apr 13th 2009, 06:07 AM

• Replies: 2
• Views: 688
Apr 13th 2009, 01:12 AM
27. ### Where did I go wrong in solving this trigonometry equation?

• Replies: 2
• Views: 708
Apr 12th 2009, 11:47 PM
28. ### two intersecting circles with a triangle

• Replies: 4
• Views: 2,937
Apr 12th 2009, 01:10 PM

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# trigonometry sotr

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