I have just done a worksheet full of them but I have still not figured out how to do these 2 ID's Can you guys help guide me through this?
tan(x) + cos(x)/(1+sin(x)=sec(x)
cot(x)/(1-tan(x)) + tan(x)/(1-cot(x) = 1 + tan(x) + cot(x)
Thanks, I've spend an hour trying to figure these two and im so dizzy.
tan(x) + cos(x)/(1+sin(x)=sec(x)
cot(x)/(1-tan(x)) + tan(x)/(1-cot(x) = 1 + tan(x) + cot(x)
Thanks, I've spend an hour trying to figure these two and im so dizzy.
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tan(x) + cos(x)/(1+sin(x)=
sinx/cosx+cosx/(1+sinx)=
(sinx(1+sinx)+cos^2x) / (cosx(1+sinx))=
(sinx+sin^2x+cos^2x) / (cosx(1+sinx))=
(1+sinx) / (cosx(1+sinx))=
1/cosx=secx
cot(x)/(1-tan(x)) + tan(x)/(1-cot(x))=
(cosx/sinx) / ((cosx-sinx)/cosx) + (sinx/cosx) / ((sinx-cosx)/sinx =
(cos^2x) / ((sinx(cosx-sinx)) + (sin^2x) / ((cosx(sinx-cosx)) =
- cos^2xcosx / (sinxcosx(sinx-cosx)) + sin^2xsinx / ((sinxcosx(sinx-cosx)) =
(sin^3x-cos^3x) / (sinxcosx(sinx-cosx)) =
((sinx-cosx)(sin^2x+sinxcosx+cos^2x)) / (sinxcosx(sinx-cosx)) =
((sinx-cosx)(1+sinxcosx)) / (sinxcosx(sinx-cosx))=
(1+sinxcosx) / sinxcosx =
1+(1/sinxcosx)=
1+((sin^2x+cos^2x)/sinxcosx)=
1+(sin^2x/sinxcosx)+(cos^2x/sinxcosx)=
1+sinx/cosx+cosx/sinx=
1+tanx+cotx
sinx/cosx+cosx/(1+sinx)=
(sinx(1+sinx)+cos^2x) / (cosx(1+sinx))=
(sinx+sin^2x+cos^2x) / (cosx(1+sinx))=
(1+sinx) / (cosx(1+sinx))=
1/cosx=secx
cot(x)/(1-tan(x)) + tan(x)/(1-cot(x))=
(cosx/sinx) / ((cosx-sinx)/cosx) + (sinx/cosx) / ((sinx-cosx)/sinx =
(cos^2x) / ((sinx(cosx-sinx)) + (sin^2x) / ((cosx(sinx-cosx)) =
- cos^2xcosx / (sinxcosx(sinx-cosx)) + sin^2xsinx / ((sinxcosx(sinx-cosx)) =
(sin^3x-cos^3x) / (sinxcosx(sinx-cosx)) =
((sinx-cosx)(sin^2x+sinxcosx+cos^2x)) / (sinxcosx(sinx-cosx)) =
((sinx-cosx)(1+sinxcosx)) / (sinxcosx(sinx-cosx))=
(1+sinxcosx) / sinxcosx =
1+(1/sinxcosx)=
1+((sin^2x+cos^2x)/sinxcosx)=
1+(sin^2x/sinxcosx)+(cos^2x/sinxcosx)=
1+sinx/cosx+cosx/sinx=
1+tanx+cotx