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1. ### Solve the identity 1/(secA-1) - 1/(secA+1)= 2 cot^2A???

... the RHS now becomes 1 - cos^2A Now we have LHS and RHS as sin^2 A = 1 - cos^2A Adding cos^2A...

1 Answers · Education & Reference · 12/02/2014

2. ### Help with a proof by contrapositive?

...5x - 2 = 2m for m ∈ Z So 5x = 2m + 2 This implies LHS is even. So x is even too, i.e. x = 2n for n ∈ Z...

1 Answers · Education & Reference · 10/02/2014

3. ### How do I graph a problem such as 2x(sub1) + 3x(sub2) = 19?

...2 variables x and y. And the function is y = f(x), where LHS is some function of x. Therefore all you have is one variable...

1 Answers · Education & Reference · 07/02/2014

4. ### how do you solve ln(3x+3)=2?

...1) take exponential of both sides. Doing that gets rid of ln on LHS - 3x + 3 = exp (2) 2) subtract 3 from both sides 3x = exp(2) - 3 3) ...

2 Answers · Education & Reference · 06/02/2014

5. ### Math Question about implicit Differentiation?

...of the radical by squaring both sides x^2 = 5000 - 2p^3 then on LHS d(x^2) /dx = 2x On RHS d(5000)/dx = 0 d (-2p^3) dx = -6p^2...

1 Answers · Education & Reference · 06/02/2014

6. ### how do you solve that? (xcosx + y2/x)dx = (xsinsx/y + y)dy?

...y I also cannot tell if 2 is a coefficient or exponent on LHS. And neither can I tell what the numerator is on LHS in...

1 Answers · Education & Reference · 04/02/2014

7. ### Trig Identity Problem?

... these 2 identities and some algebraic manipulations, the LHS can be rewritten as 2cos(x)^2 + sin(x)^2 - 1 and f (x) = sqrt [ 2cos...

1 Answers · Education & Reference · 30/01/2014

8. ### 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

9. ### 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

10. ### 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