
 0
 0
posted by Steve
Respond to this Question
Similar Questions

calc
Where do I start to prove this identity: sinx/cosx= 1cos2x/sin2x please help!! Hint: Fractions are evil. Get rid of them. Well, cos2x = cos2x  sin2x, so 1coscx = 1  cos2x  sin2x = 1  cos2x + sin2x You should be able to
asked by maria on October 21, 2006 
TRIG!
Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6 x=1  (3/4)sin^2 2x work on one side only! Responses Trig please help!  Reiny, Monday, February 23, 2009 at 4:27pm LS looks like the sum of cubes sin^6 x +
asked by hayden on February 24, 2009 
Mathematics  Trigonometric Identities
Let y represent theta Prove: 1 + 1/tan^2y = 1/sin^2y My Answer: LS: = 1 + 1/tan^2y = (sin^2y + cos^2y) + 1 /(sin^2y/cos^2y) = (sin^2y + cos^2y) + 1 x (cos^2y/sin^2y) = (sin^2y + cos^2y) + (sin^2y + cos^2y) (cos^2y/sin^2y) =
asked by Anonymous on November 8, 2007 
tigonometry
expres the following as sums and differences of sines or cosines cos8t * sin2t sin(a+b) = sin(a)cos(b) + cos(a)sin(b) replacing by by b and using that cos(b)= cos(b) sin(b)= sin(b) gives: sin(ab) = sin(a)cos(b)  cos(a)sin(b)
asked by Pablo on November 26, 2006 
PreCalc
How do I solve this? My work has led me to a dead end. tan(45x) + cot(45x) =4 my work: (tan45  tanx)/(1+ tan45tanx) + (cot45  cotx)/(1 + cot45cotx) = 4 (1tanx)/(1+tanx) + (1cotx)/(1+cotx) = 4 Then I found a common
asked by Jess on February 7, 2007 
algebra
Can someone please help me do this problem? That would be great! Simplify the expression: sin theta + cos theta * cot theta I'll use A for theta. Cot A = sin A / cos A Therefore: sin A + (cos A * sin A / cos A) = sin A + sin A = 2
asked by Valerie on February 18, 2007 
trig
it says to verify the following identity, working only on one side: cotx+tanx=cscx*secx Work the left side. cot x + tan x = cos x/sin x + sin x/cos x = (cos^2 x +sin^2x)/(sin x cos x) = 1/(sin x cos x) = 1/sin x * 1/cos x You're
asked by Devon on May 8, 2007 
trig
Reduce the following to the sine or cosine of one angle: (i) sin145*cos75  cos145*sin75 (ii) cos35*cos15  sin35*sin15 Use the formulae: sin(a+b)= sin(a) cos(b) + cos(a)sin(b) and cos(a+b)= cos(a)cos(b)  sin(a)sin)(b) (1)The
asked by Paul C on November 26, 2006 
math
Prove that for all real values of a, b, t (theta): (a * cos t + b * sin t)^2
asked by mathstudent on December 20, 2006 
Pre calc
Someone please help me prove these A) cos^4xsin^4x=cos2x B)tanx=sin^2x/1+cos^2x Please and Thank you
asked by Bethany on April 14, 2017