# Yahoo Web Search

1. Sort by

1. ### Grade 11 Math Help?

...4c)+8c now a=5 as both powers of x^4 need to have a coefficient of 5 (the LHS already does) b-4a=-14 <----- we know what a is c-4b+8a...

1 Answers · Science & Mathematics · 05/10/2016

2. ### How can I prove that a pendulum follows SHM? Does being isochronous mean it follows SHM?

SHM is the solution of the form y= a sin wt. Pendulum whne displaced by a small amount follows the shm.

1 Answers · Science & Mathematics · 23/08/2016

3. ### Prove the identity. Tanx = csc2x-cot2x?

...2sinxcosx) = [1 - 1 +2 sin^2 (x)] /(2sinxcosx) = 2sin^2 (x) /(2sinxcosx) = sinx/cosx = tanx = LHS, as desired. Hope this helps !!!!!!!!!!!!!!!!!!!!!!!

2 Answers · Science & Mathematics · 22/07/2016

4. ### If I have an absolute value equation where there are absolute values on both sides of the equation, what do I do? Ex. |x² + 2x -3|=|x+5|?

...2x -3|=|x+5| You can drop the absolute values signs, and set LHS = ±RHS x^2 + 2x - 3 = x + 5 x^2 + x - 8 = 0 x = (-1 ±√33)/2 or x^2 + 2x...

2 Answers · Science & Mathematics · 04/05/2016

5. ### Challenging statistics probability distribution question?

...but YAH does not like the repeated "...." so, use the LHS from the tree AND the factors in the calc of P(X=k...

1 Answers · Science & Mathematics · 28/02/2016

6. ### How to prove trig identity secxcscx = (cotx + tanx)^2?

RHS= (cotx+tanx)^2= cot^2(x)+tan^2(x)+2= csc^2(x)-1+sec^2(x)-1+2= 1/sin^2(x)+1/cos^2(x)= [cos^2(x)+sin^2(x)]/[sin^2(x)cos^2(x)]= 1/[sin^2(x)cos^2(x)]= csc^2(x)sec^2(x)= [cscxsecx]^2=/= LHS Check your problem!

2 Answers · Science & Mathematics · 28/01/2016

7. ### 2(5^6x) – 9(5^4x) + 13(5^2x) – 6 = 0?

...have 3rd degree polynomial. Let's check if 1 is a root ... LHS = 2(1³) - 9(1²) + 13(1) - 6 = 2 - 9 + 13 - 6 = 0 = RHS ...

2 Answers · Science & Mathematics · 11/01/2016

8. ### Compounded Interest question?

...log(1 + i/360) = log(1.026875)/90 = 1.2797311976818827160823125386334e-4 Calculate 10^LHS and 10^RHS and you have 1 + i/360 = 1.0002947124170559851314838805676 i =0.10609647014015464733419700432939...

1 Answers · Science & Mathematics · 29/11/2015

9. ### How can I solve this Trig Identity?

...) = 1-2sin²x <<< LHS ... factor denom. = (2cos²x-1)² / [(cos²x + sin²x...

1 Answers · Science & Mathematics · 18/11/2015

10. ### Prove sinxcosx/1+cosx=1-cosx/tanx?

I will assume the equation is: sinxcosx/(1+cosx) = (1-cosx)/tanx LHS multiply (1-cosx)/(1-cosx) sinxcosx(1-cosx)/[(1+cosx)(1-cosx)] = (1-cosx)/tanx sinxcosx(1...

1 Answers · Science & Mathematics · 30/10/2015