Question

$if \: \sin(x) = \cos {}^{2} (x)$
$what \: is \: the \: value \: of \: { \cos }^{8} x + 2 { \cos }^{6} x + { \cos }^{4} x$
please answer fast and i will mark him/her as brainliest ​

Answer 1

Answer:

sin x = cos ^2 x

therefore

cos^8x + 2 cos ^6 x + cos ^4x

sin^4x + cos^4x + 2cos^6x

1-2sin^2x.cos^2x + 2cos^6x

1 - 2 cos ^6x + 2cos^6x

= 1 answer

Step-by-step explanation:

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Answer 2

Answer:

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