# Trigonometry Forum

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

1. ### Pythagorean Triples Formula

• Replies: 3
• Views: 1,138
Nov 20th 2010, 05:49 PM
2. ### Inverse Trigonometric Functions

• Replies: 2
• Views: 698
Nov 20th 2010, 12:41 PM
3. ### Which trigonometric identity do I use?

• Replies: 1
• Views: 848
Nov 20th 2010, 09:59 AM
4. ### Evaluate 1-2(cos^2)25/1-2(sin^2)65

• Replies: 1
• Views: 1,820
Nov 20th 2010, 09:15 AM
5. ### Can't prove these identities?

• Replies: 6
• Views: 869
Nov 20th 2010, 07:07 AM
6. ### r formula visualization

• Replies: 18
• Views: 3,471
Nov 20th 2010, 04:37 AM
7. ### Help with hexagon area question...

• Replies: 3
• Views: 836
Nov 18th 2010, 04:57 PM
8. ### Trig Equations

• Replies: 10
• Views: 827
Nov 18th 2010, 01:31 PM
9. ### [SOLVED] De Moivre's Theorem

• Replies: 7
• Views: 957
Nov 18th 2010, 01:06 PM
10. ### Trigonometric Identities

• Replies: 2
• Views: 490
Nov 18th 2010, 12:09 AM
11. ### Trig triangle word problem

• Replies: 1
• Views: 682
Nov 17th 2010, 10:46 PM
12. ### Trigonometric equations

• Replies: 5
• Views: 554
Nov 17th 2010, 08:12 PM
13. ### Location of a fire

• Replies: 1
• Views: 3,321
Nov 16th 2010, 04:10 PM
14. ### Trig identities with special triangles

• Replies: 2
• Views: 973
Nov 15th 2010, 10:43 PM
15. ### How to solve this trig equation!

• Replies: 3
• Views: 542
Nov 15th 2010, 07:31 PM
16. ### Prove (1+cos x/1+cot x) = tan x

• Replies: 2
• Views: 1,374
Nov 15th 2010, 04:16 PM
17. ### Prove that sin2x-tanx=tanXcos2X

• Replies: 4
• Views: 7,470
Nov 15th 2010, 03:45 PM
18. ### Prove Cos3x=4(cos^3)x-3cosx

• Replies: 8
• Views: 4,002
Nov 15th 2010, 11:57 AM
19. ### Inverse cotangent on calculator.

• Replies: 5
• Views: 1,779
Nov 15th 2010, 10:09 AM
20. ### Proof of cos(arcsin(x))

• Replies: 1
• Views: 9,925
Nov 14th 2010, 11:46 AM
21. ### Quite an easy trig identity question - need pointers

• Replies: 6
• Views: 590
Nov 14th 2010, 06:55 AM
22. ### Finding the amplitude

• Replies: 6
• Views: 804
Nov 13th 2010, 08:41 PM
23. ### Solving a trigonometric equation.

• Replies: 7
• Views: 473
Nov 13th 2010, 06:16 PM
24. ### Worded Trig Problem

• Replies: 1
• Views: 422
Nov 12th 2010, 10:36 PM
25. ### Word problems on trigonometric ratios.

• Replies: 7
• Views: 838
Nov 12th 2010, 06:55 PM
26. ### finding solutions for cos

• Replies: 8
• Views: 656
Nov 12th 2010, 05:05 PM
27. ### Angle of projectile

• Replies: 0
• Views: 493
Nov 11th 2010, 02:07 PM
28. ### How can I draw the graph

• Replies: 1
• Views: 663
Nov 11th 2010, 03:46 AM

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