Question

2(cos²A - sin²A) +1

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Answer 1

Answer:

$2( { \cos(x) }^{2} - { \sin(x) }^{2} ) + 1 \\ 2( 1 - { \sin(x) }^{2} - { \sin(x) }^{2} ) + 1 \\ 2(1 - 2 { \sin(x) )}^{2} + 1 \\ 2 \times \cos(2x) + 1$

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