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Tag: prove

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1. ### Prove that sin(x)+cos(x) is equal or larger than 1

• Replies: 11
• Views: 281
Last Post: January 15th, 2017 13:44
by I like Serena

Forum:
Trigonometry

2. ### property of multiple of 2016

• Replies: 6
• Views: 159
Last Post: January 7th, 2017 02:29
by vidyarth
3. ### Prove (x+y+z)²+(a+b+c)²≥1

• Replies: 4
• Views: 154
Last Post: January 5th, 2017 04:49
by Opalg
4. ### prove :1/a^{2n+1}+1/b^{2n+1}+1/c^{2n+1}=1/{a^{2n+1}+b^{2n+1}+c^{2n+1}}

• Replies: 2
• Views: 89
Last Post: January 1st, 2017 02:33
by Albert
5. ### sum of 100 terms (continued)

• Replies: 3
• Views: 129
Last Post: December 31st, 2016 17:27
by Saknussemm
6. ### Sum of a hundred terms

• Replies: 6
• Views: 241
Last Post: December 29th, 2016 09:02
by anemone
7. ### prove all a_ns are integers

• Replies: 2
• Views: 85
Last Post: December 26th, 2016 13:42
by Albert
8. ### Prove 1 ≤ x²+y²+z² ≤ 2

• Replies: 6
• Views: 208
Last Post: December 14th, 2016 11:36
9. ### Prove that PQR is isosceles?

• Replies: 4
• Views: 131
Last Post: December 10th, 2016 08:29
by mathlearn

Forum:
Geometry

10. ### Proving determinant

• Replies: 4
• Views: 165
Last Post: November 26th, 2016 11:08
by MaryAnn
11. ### Nine-Point Circle

• Replies: 1
• Views: 129
Last Post: November 15th, 2016 21:14
by greg1313

Forum:
Geometry

12. ### Problem of the week #240 Nov 5th, 2016

• Replies: 1
• Views: 144
Last Post: November 12th, 2016 12:16
by anemone
13. ### Problem of the week #238 Oct 20th, 2016

• Replies: 1
• Views: 212
Last Post: October 29th, 2016 00:38
by anemone
14. ### Proving Scalar Product

• Replies: 1
• Views: 103
Last Post: October 27th, 2016 23:07
by GJA
15. ### Prove, that the decimal representation: pk = 11111...1 exists for every prime, p > 5.

• Replies: 3
• Views: 207
Last Post: October 26th, 2016 23:41
16. ### using trigonometry to prove <c=50 degree

• Replies: 1
• Views: 97
Last Post: October 23rd, 2016 00:04
17. ### Prove, that a is an integer

• Replies: 10
• Views: 382
Last Post: October 21st, 2016 14:45
by lfdahl
18. ### Piecewise limits

• Replies: 2
• Views: 182
Last Post: October 18th, 2016 03:48
by Opalg

Forum:
Calculus

19. ### prove inequality

• Replies: 1
• Views: 113
Last Post: October 7th, 2016 12:07
by Euge
20. ### Prove that triangle BAD is isosceles and....

• Replies: 4
• Views: 211
Last Post: October 5th, 2016 23:10
by mathlearn

Forum:
Geometry

21. ### Prove congruence for powers of 2

• Replies: 3
• Views: 187
Last Post: October 3rd, 2016 16:20
by caffeinemachine
22. ### Determinant of matrix with Aij = min(i, j)

• Replies: 3
• Views: 145
Last Post: October 2nd, 2016 12:55
by Evgeny.Makarov
23. ### Polynomial inequality

• Replies: 7
• Views: 313
Last Post: September 29th, 2016 03:33
24. ### prove relationship between sets

• Replies: 4
• Views: 246
Last Post: September 27th, 2016 19:40
by HallsofIvy
25. ### Prove that center of DG = center of the red circle.

• Replies: 1
• Views: 104
Last Post: September 25th, 2016 16:34
by Opalg

Forum:
Geometry

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