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1. ### How do I solve 4^(x-1)=32^4?

LHS: 4^(x-1)=(2^2)^(x-1)=2^(2x-2) RHS: 32^4=(2^5)^4=2^20 Therefore 20=2x-2 x=11

1 Answers · Education & Reference · 24/01/2014

2. ### Proving trigonometric identities, help?

... -- We cross multiply both LHS and RHS (cos (2x)) ( 1 - tan (x)) = (1+ tan(x)) (1 - sin(2x)) Expanding...

1 Answers · Education & Reference · 28/01/2014

3. ### help with trigonometric identities?

... that we are done with the RHS, we have to work on the LHS cos(2A) = cos (A+A) = cos A cos A - sin A...

1 Answers · Education & Reference · 26/01/2014

4. ### Trigonometry Identity Help: cos^2 3x - cos^2 x= - sin2xsin4x?

LHS = cos² (3x) - cos² (x) => [ ( cos 3x + cos x ) * ( cos 3x - cos x...

1 Answers · Education & Reference · 21/01/2014

5. ### verify the identity: 2 csc 2u=sec u csc u?

LHS: 2 csc 2u = 2 / (sin 2u) = 2 / (2 sin u cos u) = 1 / (sin u cos u) = (1/sin u) * (1/cos u) = sec u csc u = RHS

1 Answers · Education & Reference · 26/01/2014

6. ### Help me solve for augmented matrix?

...1 -1 | -4 ) we can now apply row operations to obtain identity matrix on LHS r2 → r1 - r2 (1 1 | -6 ) (0 2 | -2) r2 → 0.5r2 (1 1 | -6 ) (0 1 | -1...

1 Answers · Education & Reference · 22/01/2014

7. ### How can u graph X+6y=-2?

First make x on LHS and other variable y on RHS thus we get, X = -2 -6Y Now...

1 Answers · Education & Reference · 25/01/2014

8. ### How to solve z(z^2+1)=3+2^3?

there could be 2 possibilities on LHS here since you didn't include exponential parenthesis...take the 4th root of the RHS If LHS is 1st possibility, you use newton's method...

2 Answers · Education & Reference · 20/01/2014

9. ### How do I Solve this precalculus problem?

(sinx) (tanx) / 1- cosx = secx + 1 LHS = sin x * ( sin x / cos x ) divided by ( 1 - cos x ) => sin²...

1 Answers · Education & Reference · 05/12/2013

10. ### Let a=2i-j, b=4i-3j, and c=-2-j calculate a.b,a.c and a.(b+c) and vertify that a.(b+c)=a.b+a.c?

... = 8i^2 - 10ij + 3j^2 + [-4i - 2ij + 2j +j^2] = 8i^2 - 12ij + 4j^2 - 4i + 2j LHS = RHS Hence proved!!

1 Answers · Education & Reference · 25/11/2013