21PLZZZ HELP....
Q4 If the normal at the point P(θ) to the ellipse x2/14+y2/5=1 intersects it again at the point Q(2θ), then cosθ=
SUM1 PLZ FIND THE ERROR IN MY METHOD PLZZZZ......
@ IS ASSUMED AS θ
the 1st Eqn. is that of normal at point @.
If that wen produced meets the ellipse at 2@ we can apply eqn of chord joining two points @ & 2@ given by eqn 2.
but the Eqn. of chord is same as Eqn. of normal thus comparing Eqn 1 & 2
we get result 3......
then the value of cos@ that we get is sumwer around .47
PLZZZ HELP SPOT THE NOT IF NE!!!!!!!!!!1
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5 Answers
13hey tapanmast...
ur equations are all correct but d value of cosθ (i.e., =0.47) is wrong...
solve it once again... i juzz cross-checked ur answer and i got it to be wrong... try it out once again...
v'll get d final equation as .......... sinθ + sin2θ = 5/9... solve it from here...
21OOOHHHHHHHHHH!!!!!!!!
YEAH MAK U R RITE!!!!!
I HAD TAKEN
2SINCOS = COS + COS :((((((
U R RITE IT HAS 2 BE SIN + SIN....
SO UR EQN IS CORRECT.......
THE ANSWER FOLLOWS FRM THER ON!!!!
