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Jika untuk setiap x, maka = ....

Jika a space sin space x space plus space b space cos space x space equals space sin space left parenthesis 30 to the power of 0 plus x right parenthesis untuk setiap x, maka a square root of 3 plus b = ....

  1. -1

  2. -2

  3. 1

  4. 2

  5. 3

Jawaban:

a space sin space x space plus space b space cos space x space equals space sin space left parenthesis 30 to the power of 0 plus x right parenthesis

a space sin space x space plus space b space cos space x space equals space sin space 30 to the power of 0 space cos space x space plus space cos space 30 to the power of 0 space sin space x space  equals 1 half cos space x space plus 1 half square root of 3 space sin space x  equals 1 half square root of 3 space sin space x space plus space 1 half cos space x

Maka

a equals 1 half square root of 3  b equals 1 half

Jadi,

a square root of 3 plus b  equals 1 half square root of 3 left parenthesis square root of 3 right parenthesis plus 1 half equals 1 1 half plus 1 half equals 2

0

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