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#1 Re: Help Me ! » Prove identity » 2007-11-14 06:35:07

That was the trick....thank you for your help.

#2 Help Me ! » Prove identity » 2007-11-14 01:34:13

lisa123
Replies: 2

:oprove the identity
(1-sin^2beta)(1+sin^2beta)=2cos^2beta - cos^4 beta

#3 Help Me ! » pre calculus » 2007-11-13 04:32:54

lisa123
Replies: 1

I am having trouble with the topic
the question is find all the sine, cosine and tangent of alpha if sec alpha = -4sqrt5/5 and is in the second quadrant.

#4 Help Me ! » need help! » 2007-11-12 02:27:54

lisa123
Replies: 1

A balloon is between two spotters who are 1.2 miles apart. One
>spotter reports that the angle of elevation of the balloon is 76
>degrees, and the other reports that it is 68 degrees. What is the
>altitude of the balloon in miles?

#5 Help Me ! » Drug Level » 2007-11-11 04:47:04

lisa123
Replies: 1

Doctor Wants A Drug Level To Be 5.58 Mg In A Patient Taking 2.5 Mg How Often Should The Doses Be Taken?
And
What Is The Difference Between 2.5 Mg Every 12 Hrs And 5mg Every 24.

I Have The Formula But Am Not Sure How To Use It.

#6 Help Me ! » drug levels » 2007-11-11 03:10:22

lisa123
Replies: 1

If 2.5 mg of a drug with half-life of 14 hrs is taken every 24 hrs, then to what level does the drug build up over time?

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