Question

If pn=cosn+sinn then pn-2 - pn = sin^2 cos^2 p where

Answer 1

Answer:

Step-by-step explanation:

ANSWER

P

n

​

=cos

n

θ+sin

n

θ

P

n

​

−P

n−2

​

=cos

n

θ+sin

n

θ−cos

n−2

θ−sin

n−2

θ=−sin

2

θcos

n−2

θ−cos

2

θsin

n−2

θ=−sin

2

θcos

2

θ(cos

n−4

θ+sin

n−4

θ)

=−sin

2

θcos

2

θP

n−4

​

k=−sin

2

θcos

2

θ