Jika sin A = x, dan Cos A = y, maka nilai dari : cos (270 0 – A) + sin (90 0 + A) adalah ….
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Penjelasan dengan langkah-langkah:
[tex] \sin(a) = x[/tex]
[tex] \cos(a) = y[/tex]
[tex] \: [/tex]
[tex] = \cos(270 \degree - a) + \sin(90 \degree + a) [/tex]
[tex] = \cos(270 \degree) \cos(a) + \sin(270 \degree) \cos(a) + \sin(90 \degree) \cos(a) + \cos(90 \degree) \sin(a) [/tex]
[tex] = 0. \cos(a) + ( - 1). \sin(a) + 1. \cos(a) + 0. \sin(a) [/tex]
[tex] = - \sin(a) + \cos(a) [/tex]
[tex] = - x + y[/tex]
[answer.2.content]
