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Sederhanakan bentuk persamaan ( sin α + cos α ) 2 + ( sin α – cos α ) 2 !

Sederhanakan bentuk persamaan !

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F. Ayudhita

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begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell left parenthesis sin proportional to plus cos proportional to right parenthesis squared plus left parenthesis sin proportional to negative cos proportional to right parenthesis squared end cell equals cell open parentheses sin proportional to plus cos proportional to close parentheses open parentheses sin proportional to plus cos proportional to close parentheses plus left parenthesis sin proportional to negative cos proportional to right parenthesis left parenthesis sin proportional to negative cos proportional to right parenthesis end cell row blank equals cell sin squared proportional to plus 2 sin proportional to cos proportional to plus cos squared proportional to plus sin squared proportional to negative 2 sin proportional to cos proportional to plus cos squared proportional to end cell row blank equals cell sin squared proportional to plus cos squared proportional to plus sin squared proportional to plus cos squared proportional to end cell row blank equals cell 1 plus 1 end cell row blank equals 2 end table end style

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Jawablah pertanyaan-pertanyan di bawah ini dengan benar! Buktikan Identitas trigonometri berikut. 3 cos 2 x = 3 − 3 sin 2 x

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