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Tag: cos

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1. ### teacher couldn't help me understand: y'-2y=sin(x) to -sin x(B + 2A) + cos x(A-2B)=...

• Replies: 9
• Views: 1,644
Last Post: 02-05-2018 11:02 PM
by Dr.Peterson
2. ### Problem with sin in a question: "Find all real numbers x such that sin(x) =√3/2"

• Replies: 1
• Views: 730
Last Post: 10-11-2017 04:20 PM
by stapel
3. ### Find angle A in a right-angled triangle, with cos C= 4/5? (with diagram)?

• Replies: 4
• Views: 1,336
Last Post: 12-04-2016 05:06 PM
by mmm4444bot
4. ### double integral with square costh

• Replies: 0
• Views: 1,354
Last Post: 01-29-2016 07:26 AM
by maxandri
5. ### Find all angles α in radians from the range −π < α < 0 for cos α = √3/2

• Replies: 2
• Views: 1,921
Last Post: 01-25-2016 12:22 AM
by pka
6. ### Need help on limit problem!!!

• Replies: 1
• Views: 1,562
Last Post: 09-17-2015 05:55 AM
by Subhotosh Khan

Forum:
Calculus

7. ### Calculating the third side of a triangle using sin/cos/tan

• Replies: 5
• Views: 2,814
Last Post: 05-25-2015 04:38 PM
by javaIsLove
8. ### Need help with lim (L'Hopital)

• Replies: 2
• Views: 1,376
Last Post: 05-07-2015 04:04 PM
by Ishuda

Forum:
Calculus

9. ### Sin cos Formula

• Replies: 9
• Views: 6,803
Last Post: 04-03-2015 03:25 PM
by silverfox12
10. ### sin A - sin B + sin C = 4 sin (A/2) cos (B/2) sin (C/2)

• Replies: 1
• Views: 29,846
Last Post: 06-16-2014 01:16 PM
by Subhotosh Khan
11. ### Sin Cos Question

• Replies: 8
• Views: 3,955
Last Post: 06-17-2014 11:51 PM
by Dale10101
12. ### Calculating cosine and sine by hand

• Replies: 5
• Views: 5,791
Last Post: 05-28-2014 05:48 PM
by BlackBeltPanda
13. ### tangent line ARG

• Replies: 3
• Views: 2,351
Last Post: 05-25-2014 11:16 PM
by Quaid

Forum:
Calculus

14. ### Show that area enclosed by the curve r= cos(2φ) is pi/4. How to do so?

• Replies: 2
• Views: 5,428
Last Post: 05-04-2014 02:12 PM
by Subhotosh Khan

Forum:
Calculus

15. ### what do i do to get 13 degrees in this formula

• Replies: 1
• Views: 1,464
Last Post: 09-08-2013 06:30 PM
by Subhotosh Khan
16. ### Help me solve this please

• Replies: 1
• Views: 1,478
Last Post: 09-02-2013 04:55 PM
by Subhotosh Khan
17. ### Solving a sin/cos equation with identities

• Replies: 3
• Views: 2,523
Last Post: 10-16-2012 02:57 PM
by ChristaJoy
18. ### Express cosx in terms of other trigonometric functions

• Replies: 3
• Views: 7,110
Last Post: 03-18-2012 03:40 PM
by Subhotosh Khan
19. ### Trigonometry Identities

• Replies: 0
• Views: 1,429
Last Post: 02-24-2012 03:47 PM
by itsclaire9
20. ### Pre-Calculus COS question

• Replies: 1
• Views: 1,775
Last Post: 10-16-2011 08:13 PM
by daon2

Forum:
Calculus

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