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Answered

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The expression (cos 60°)(cos 30°) − (sin 60°)(sin 30°) can be rewritten as which of the following?

sin 30°
sin 90°
cos 30°
cos 90°

Sagot :

Hrishii

Answer:

cos 90°

Step-by-step explanation:

(cos 60°)(cos 30°) − (sin 60°)(sin 30°)

= cos ( 60° + 30°)

= cos 90°

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