Question

please give me the answer ​

Answer 1

Answer:

$\sin(o) + { \sin(o) }^{2} = 1 \\ \sin(o) = 1 - { \sin(o) }^{2} \\ \sin(o ) = { \cos(o) }^{2} \\ put \: value \: of \: { \cos(o) }^{2} in \: given \: lhs \\ { \cos(o) }^{2} + ( { \cos(o) }^{2} ) {}^{2} \\ \sin(o) + { \sin(o) }^{2} \\ given \: that \: \sin(o) + { \sin(o) }^{2} = 1 \\ hense \: { \cos(o) }^{2} + { \cos(o) }^{4} = 1 \\ hense \: proved$

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