Question

cos2x-cos^2x=0 use the identities

Answer 1

Do you know the double angle formula for cos2x?

Answer 2

all integral pi values\[2\cos^2x-1-\cos^2x=0 \rightarrow cosx=+1 or -1\]

Answer 3

cos^2x+sin^2x-cos^2x=0
Sin^2x=0

Answer 4

DID YOU ASK ME (PHANI)

Answer 5

doesnt my answer need to be zero?

Answer 6

from -sin^2x=0 what do i do next?