Show that (sin7x+sinx)- 2sin2xcos3x= 4cos²3xsinx

Show that y= x + sinx-pi satisfies the initial value problem dy/dx=1 + cos x, y(pi)= 0 i don...

Show that tanx= (sinx/ cosx) can be written as: tan(x-y) = (tanx - tany) / (1+ tanxtany)

Show that sinx = (square root of) 1 - cos^2x is not an identity

how do you find sin7x/4x when lim x goes to 0 the answer is 7/4

show that sinx/(1-cotx)+cosx/(1-sinx)=sinx+cosx thanks

Show that sin(x+pi)=-sinx. So far, I used the sum formula for sin which is sin(a+b)=sin a cos b+c...

Show that sin(x+pi)=-sinx. Show all of your work.

if f(x)=sinx, show that f(x+y)-f(x)=cosx siny-2sinx sin^2(y/2)

Limitx--->0 sin7x/5x

Prove that cos7x+cos5x/sin7x-sin5x=cotx

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