ronniebelle Posts: 1, Reputation: 1 New Member #1 Jan 18, 2010, 12:55 PM
Algebraic proofs
Prove that
Given a<b
Given c<d
 ebaines Posts: 12,132, Reputation: 1307 Expert #2 Jan 18, 2010, 01:03 PM

Let $b = a+\delta$ and $d = c+\Delta$. Then sub these into ad + because and ac + bd, and see how the two compare.

 Question Tools Search this Question Search this Question: Advanced Search

## Check out some similar questions!

Algebraic Proofs [ 3 Answers ]

how do I do this? Fill in the missing information in this Algebraic proof. Two lines intersect. Angle 1 equals ( 3x + 20) . Angle 2 = (5x - 16) , Angles 1 and 3 are vertical angles. The measure of angle 1 = the measure of angle 3. (Vertical Angles are Congruent) a.) _____ = (5x - 16)...

Trigonometry proofs [ 4 Answers ]

how do you prove that tanx+coty / tanxcoty = tany+cotx

Trig proofs [ 1 Answers ]

how do you prove cosx+sinxtanx=secx

Proofs? Identities? [ 4 Answers ]

Some one teach me precal I can't do any of this. Prove the identity: (cosx)(tanx+sinxcotx)=sinx+cos^2x (thats cos squared times x)