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# Forum: Geometry and Trig

1. ### Sticky: Read Before Posting!!

• Replies: 0
• Views: 22,122
Ted
02-21-2006, 12:22 AM
1. ### length of segment in parallelogram: BC = 4 cm , CD = 9 cm then what is AP ?

• Replies: 4
• Views: 176
Yesterday, 06:40 AM
2. ### Verifying Trig Identites: (cos(a)+cos(b))^2 + (sin(a)-sin(b))^2 = 2+2cos(a+b) and...

• Replies: 7
• Views: 266
11-15-2017, 11:22 PM
3. ### how many 26 degree agles in a 2017 corner

• Replies: 8
• Views: 142
11-14-2017, 09:36 PM
4. ### Need help for my precal HW: tan(t) = -1/√(3), 2(sin(x))^2 - 5(cos(x)) - 4 = 0

• Replies: 3
• Views: 157
11-14-2017, 07:31 PM
5. ### Trig Question Dealing with Sum, Difference, Double Angle, and Half Angle Formulas

• Replies: 2
• Views: 105
11-13-2017, 10:22 AM
6. ### Equation to find countersink angle

• Replies: 1
• Views: 141
11-13-2017, 01:13 AM
7. ### Precalc: Solve 2sinx^(2 ) - 5cosx - 4 = 0, 2cosx^(2) = 3sinx + 3

• Replies: 2
• Views: 129
11-13-2017, 12:40 AM
8. ### Proving trig identities: cos(g+h)cos(g-h) = cos^2(g)-cos^2(h)

• Replies: 3
• Views: 169
11-09-2017, 08:00 PM
9. ### [Linear Algebra] Matrix "proof" type problem involving determinants ( I think)

• Replies: 1
• Views: 203
11-05-2017, 09:28 AM
10. ### Trig Identity Simplification of (cot(x)+tan(x))/tan(x)sec(x)

• Replies: 1
• Views: 165
11-04-2017, 08:32 PM

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