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1. ### Trigonometric Identities?

These things are fun: LHS = cotx + tanx = [cosx / sinx] + [sinx / cosx] = [cos² x + sin² x] / [sinx...

1 Answers · Education & Reference · 17/10/2012

2. ### help with some trig identities?

LHS = (sec x-csc x)./ (sec x csc x) = (1/cosx) - (1/sinx) / [(1/cosx)(1/sinx)] = [(sinx...1] [because to divide by a fraction invert and multiply] = sinx - cosx = RHS LHS = (sin x + cos x)/ cos x - (sin x- cos x)/ sin x = [sinx(sinx + cosx) - cosx(sinx - cosx...

1 Answers · Education & Reference · 11/01/2010

3. ### Math problems?

[LHS - left side of '='. RHS - right side of '='] 1] LHS: multiply... by 60. The result is the value of P. 2] same procedure for LHS & RHS. Divide both sides by 13 to get the value of E...

4 Answers · Education & Reference · 10/01/2007

4. ### Are There Any Trig. or Pre-Cal Teachers???

LHS=sec^4 x-tan^4 x =(sec^2 x +tan^2 x) (sec^2 x-tan^2 x) Factorising) =sec...1+tan^2x+tan^x =sec^2x+tan^2x [Sd 1+tan^2x=sec^2x] Therefore,LHS=RHS proved

4 Answers · Education & Reference · 11/12/2007

5. ### How do I use Functional Identities to solve this problem?

LHS = (sec θ - tan θ)(csc θ + 1) = [(1/cos θ) - (sin θ / cos θ)] [(1/sin θ) + 1...

1 Answers · Education & Reference · 12/07/2011

6. ### x is equal to?

LHS is -, RHS is + (3x-2) - (5x-2) - (x+1) - x = 4+3+6+2 Now...

1 Answers · Education & Reference · 11/03/2014

7. ### Polynomial Expressions?

LHS = (ax + b) + (cx + d) First, get rid of the parentheses. ...

1 Answers · Education & Reference · 18/01/2012

8. ### cosx+1/cotx=sinx+tanx?

LHS = (cos(x) + 1) / cot(x) = (cos(x) + 1) / (cos(x) / sin(x)) = (sin(x))(cos(x) + 1) / cos...

1 Answers · Education & Reference · 09/06/2013

9. ### can someone help prove this trig problem?

LHS = (tanx + cotx)² = tan² x + 2 tanx cotx + cot² x = ...

2 Answers · Education & Reference · 24/10/2010

10. ### 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