ghareebahfiddunya ghareebahfiddunya

28-11-2019
Mathematics

contestada

prove identity: sin2x-tanx=cos2xtanx

Respuesta :

PollyP52 PollyP52

28-11-2019

Answer:

See below.

Step-by-step explanation:

sin2x-tanx

= 2sinx cosx - sinx/cos

= (2sinx cos^2x - sin x) / cos x

= sinx ( 2 cos^2x - 1 ) / cos x

Now sin x / cos x = tanx and 2 cos^2 x - 1 = cos2x

so this simplifies to cos2x tan x.

Answer Link

Otras preguntas

how did most settlers view themselves in relation to england

equation of slope 4, through (7,2)

what do scientist study to learn prehistory?

What is 345,000 in expanded form

Stan works on an assembly line. What effective and appropriate approach would he be wise to use when coping with minor frustrations like hang-ups on a conveyor

is the greatest common factor of any two even numbers always even

0.77 what is the value of the digit in the tenths

skills of citizens health of citizens education of citizens values of citizens What do these factors MOST LIKELY represent? A) human capital B) literacy rate C)

Andy and Elizabeth each rounded 2,639,456 to the nearest ten-thousand. Andy got 2,640,000. Elizabeth got 2,630,000. who is correct? explain the error that was m

What principles do the magna Carta, the petition of right, and the English bill of rights have on common