cos4thita/cos2phi+ sin 4 thita/sin2phi=1 given to prove cos4phi/cos2thita+ sin 4 phi/sin2thita plz if u provide online chating with tutor u will provide this faciliyno
plz u solve na i think u have no idea about if u solve plz solve it is phi not pie means 22/7
Try to learn to write greek letters to avoid misunderstandings : e.g. thita, phi.
it is not phi
it is phy phai now u understand or not
We'll re-write the condition, multiplying both sides by the least common denominator, that is the product of denominators of the terms from the left side: cos2pi*sin 2pi.
But cos 2pi = 1 and sin 2pi = 0 => cos2pi*sin 2pi = 1*0 = 0
cos 4theta/cos2pi+ sin 4 theta/sin2pi=1
(cos2pi*sin 2pi*cos 4theta)/(cos2pi)+ (cos2pi*sin 2pi*sin 4 theta)/(sin2pi)=1*cos2pi*sin 2pi
We'll reduce like terms:
sin 2pi*cos 4theta+ cos2pi*sin 4 theta =1*0
sin (2pi + 4theta) = 0
2pi + 4theta = arcsin 0
2pi + 4theta = 0
4theta = -2pi
theta = -2pi/4
theta = -pi/2
Under this conditions, we'll calculate the expression, having theta= -pi/2.
cos4pi/cos2*(-pi/2)+ sin 4 pi/sin2*(-pi/2)
cos -pi = cos pi = -1
sin -pi = -sin pi = 0
-1/-1 + 0/0
Since the second fraction is meaningless (we cannot divide by 0), the expression cannot be computed under this conditions.