rodelroberto
rodelroberto
03-11-2015
Mathematics
contestada
Verify
(2cos2x)/(sin2x) =cotx - tanx
Respuesta :
crisforp
crisforp
03-11-2015
cos2x = (cosx)^2 - (sinx)^2;
sin2x = 2sinxcosx;
Then, (2cos2x)/(sin2x) =2[ (cosx)^2 - (sinx)^2 ] / (2sinxcosx) = [ (cosx)^2 - (sinx)^2 ] / (sinxcosx) = (cosx)^2 / (sinxcosx) - (sinx)^2 / (sinxcosx) = cosx/sinx - sinx/cosx = cotx - tanx;
Answer Link
VER TODAS LAS RESPUESTAS ( 24+ )
Otras preguntas
When 27x2z/-3x2z6 is completely simplified, the exponent on the variable z is
Which of the following was NOT a grievance against the King listed in the Declaration of Independence?
the surface a drawing is created on is called the1. ground 2. canvas 3. finish4. media
Mi madre desea que yo (salgar) con mi hermano a los museos. Pero no es cierto que nosotros (tener) tiempo hoy.
triangle ABC has the vertices A, (-6,2) B (-9,1), C (1,-6). What would be the vertices of ABC' after a reflection across the x-axis
What is the surface area of the net of the rectangular prism?
find the x-intercept of the line 2× +4y =8
both plants and animals cells have the following in common except a) Golgi apparatus b) endoplasmic recticulum c) ribosomes d)large vacuole
Which of the following is a benefit of creating a schedule for your tasks? 1.You can revise times as necessary if you don't meet your dues dates. 2.You can spen
Define maw A. A tomb B. An animal throat or mouth C. An animal paw
