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1. ### Write cot( t ) in terms of sin( t ) if the terminal point determined by t is in the third quadrant. Do not leave a?

For t in quadrant III, cos( t ) &lt; 0. Using the Pythagorean identity in this case cos( t ) = - √(1 - sin²( t )). Note the negative sign. When it is defined, we know...

1 Answers · Science & Mathematics · 27/11/2012

2. ### solve for t ?

8( t /( t -2))^2 - 2( t /( t -2)) - 3 = 0 let x = t /( t - 2) 8 x^2 - 2x - 3 = 0 (4x - 3)(2x + 1) = 0 x = 3/4 or x = -1/2 so t /( t - 2) = 3/4 4t = 3( t -2) t = -6 or t /( t - 2) = - 1/2 2t = -( t - 2) 3t = 2 t = 2/3 Ans t = -6 or t = 2/3

5 Answers · Science & Mathematics · 15/07/2008

3. ### What is the T in T -Mobile?

T -Mobile is a German provider, owned by Deutsche... began to brand its subsidiaries with the T - prefix. In 2002, as Deutsche Telekom consolidated...

4 Answers · Consumer Electronics · 16/01/2011

4. ### Solve for t : −2sin( t )+2cos(2t)=0?

-sin( t ) + cos(2t) = 0 cos(2t) = sin( t ) Formula : cos(2t) = cos^2( t ) - sin^2( t ) = 1 -sin^2( t ) - sin^2( t ) = 1-2sin^2( t ...1 Now get back to the notation sin( t ) = -1 => t = 3pi/2 which is greater than pi/2 so this...

1 Answers · Science & Mathematics · 30/06/2010

5. ### If v( t ) = (sqrt( t ^7)) - (sqrt( t )) find the second derivative?

v( t ) = ( t ^7)^(1/2) - t ^(1/2) v'( t ) = 1/2( t ^7)^(-1/2) * (7t^6) - (1/2) t ^(-1/2) v'( t ) = (7t^6)/2( t ^7)^(1/2) - 1/2( t ^1/2) and then take the second derivative of that - i won...

2 Answers · Science & Mathematics · 14/10/2009

6. ### What is f'( t ) for f( t )=( t -(1/ t ))/2?

( t -(1/ t ))/2 Multiply -1 by 1/ t Denominators must be equal to add fractions...2 * ((( t -1)( t +1))/2t) Find the derivative. d/dt (( t -1)( t +1))/2t Use the quotient rule. The quotient rule ...

2 Answers · Science & Mathematics · 19/10/2012

7. ### x = t /(1+ t ) y = ln(1+ t )?

x = t / (1 + t ); y = ln(1 + t ) dx/dt = ((1 + t ) - t ) / (1 + t )² dx/dt = 1 / (1 + t ...dt = √{(dx/dt)² + (dy/dt)²} ds/dt = √{(1 / (1 + t )²)² + (1 / (1 + t ))²} ds/dt = √{1 + (1...

1 Answers · Science & Mathematics · 21/02/2010

8. ### What is the answer to t /3-2=9?

t /3-2=9 t /3=9+2 t /3=11 t =11*3 t =33 Answer: t =33 CHECKING: LEFT SIDE:33/3-2=11-2=9 RIGHT SIDE: 9 LEFT SIDE=RIGHT SIDE THEREFORE t =33

2 Answers · Education & Reference · 30/04/2011

9. ### Find the terminal points determined by t ?

sin( t ) = 4/5 cos( t ) = 3/5 a) sin(pi - t ) = sin(pi)cos( t ) - sin( t )cos(pi) => 0 * cos( t ) - sin( t ) * (-1... t ) = -3/5 (-3/5 , 4/5) b) sin(- t ) = -sin( t ) = -4/5 cos(- t ) = cos( t ) = 3/5 (3/5 , -4/5) c) sin( t - pi) = sin( t )cos(pi...

1 Answers · Science & Mathematics · 04/11/2011

10. ### integrating 2t*(e^ t )?

∫(2 t ) (e^ t ) dt integrate by parts u = 2t , dv = e^ t dt du = 2 dt, v = e^ t ∫u dv = uv - ∫v du =&gt; ∫(2t) (e^ t ) dt = (2t) (e^ t ) - ∫(2) (e^ t ) dt = (2t) e^ t - 2e^ t + C = 2e^ t ( t - 1) + C

2 Answers · Science & Mathematics · 02/02/2010