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#1 2007-02-22 02:05:58
- Jai Ganesh
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- Registered: 2005-06-28
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Trignometry Ex.1
1. If
what is tan A?
2. If
find the value of
.
3. If
find the value of
4. If 3 tanθ = 4, determine the value of
5. If 5cosθ-12sinθ=0, what is the value of
6. If 16cotA=12, find the value of
7. Prove that
8. Prove that
9. Prove that
10. Prove that
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#2 2007-03-30 22:11:52
- serhat38
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- Registered: 2007-03-30
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Re: Trignometry Ex.1
if sinA=5/13 so cosA=12/13 then sinA/cosA=tanA (5/13)/(12/13)=5/12=tanA
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#3 2007-03-30 22:47:31
- serhat38
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Re: Trignometry Ex.1
the value of second question is 1
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#4 2007-03-30 22:49:12
- serhat38
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Re: Trignometry Ex.1
value of third question is -9/7
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#5 2007-03-30 22:50:17
- serhat38
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Re: Trignometry Ex.1
the value of forth question is 1/7
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#6 2007-03-30 22:51:28
- serhat38
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- Registered: 2007-03-30
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Re: Trignometry Ex.1
the value of fifth question is 17/19
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#7 2007-03-30 22:53:07
- serhat38
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- Registered: 2007-03-30
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Re: Trignometry Ex.1
the value of sixth question is 1/7
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#8 2007-03-30 22:56:59
- serhat38
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- Registered: 2007-03-30
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Re: Trignometry Ex.1
(sin+cos)\(sin-cos)=[(sin\cos)+1]\[(sin\cos)-1]
=[(sin+cos)\cos]\[(sin-cos)\cos]
=(sin+cos)\(sin-cos)
so (sin+cos)\(sin-cos)=(sin+cos)\(sin-cos)
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#9 2007-03-30 23:03:50
- serhat38
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- Registered: 2007-03-30
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Re: Trignometry Ex.1
if tan.cot=1
(1-tan)\(1+tan)=(cot-1)\(cot+1)
cot+1-tan.cot-tan=cot-1+tan.cot-tan
so 1-tan.cot=tan.cot-1
2=2tan.cot
tan.cot=1
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#10 2007-03-30 23:06:14
- serhat38
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- Registered: 2007-03-30
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Re: Trignometry Ex.1
tan.tan=(sin.sin)\(cos.cos)
tan.tan.cos=(sin.sin)\(cos.cos)\cos
=(sin.sin)\cos
=(sin\cos).sin
=tan.sin
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#11 2007-03-30 23:11:13
- serhat38
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- Registered: 2007-03-30
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Re: Trignometry Ex.1
now dear ganesh please solve this
cos2∏\11+cos4∏\11+cos6∏\11+cos8∏\11+cos10∏\11=?
the value is a rational
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