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#1 2013-09-08 16:37:40
- shivusuja
- Member
- Registered: 2006-09-14
- Posts: 56
Trignometry
please help me out
IF a sin x +b cos x = c . Prove that a cos b sinx=sq root(a sqared+b squared+c squared)
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#2 2013-09-08 19:05:36
- Bob
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- Registered: 2010-06-20
- Posts: 10,621
Re: Trignometry
hi shivusuja
where
Do a similar thing with the second expression leading to cos(x + alpha)
Now you can use sin^2 + cos^2 = 1 to finish the proof.
Note: But I ended up with minus c^2 not plus.
Bob
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#3 2013-09-09 02:27:26
- shivusuja
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- Registered: 2006-09-14
- Posts: 56
Re: Trignometry
thank you . may be the text book print is wrong.
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