Asked by clive

Prove :
1 + Sin2A/ Cos2A = CosA + SinA / CosA- SinA
Answered by Steve
How about some parentheses, so we can tell what's what?

As it stands, it means

1 + tan2A = cosA + tanA - sinA

which is clearly false
Answered by Reiny
Clive probably meant:
(1+sin 2A)/cos 2A = (cosA + sinA)/(cosA - sinA)

LS = (sin^2 A + cos^2 A + 2sinAcosA)/(cos^2 A - sin^2 A)
= (cosA + sinA)/( difference of squares)
= ...

I am sure you can take it from there
Answered by Steve
I AM WRONG >
Answered by goto
if x = rsinAcosC,y=rsinA sinC and z = rcosA,then prove that r2= x2+y2+z2
Answered by Pratik
There is no solution for 1
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