17-06-2021
Mathematics

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Calculate cos0 to two decimal places. 7 8 Xà A. 0.69 B. -0.14 C. -0.42 OD. -0.07

Correct answer: -0.07

Calculate cos0 to two decimal places 7 8 Xà A 069 B 014 C 042 OD 007Correct answer 007 class=

Respuesta :

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17-06-2021

Answer:

D. -0.07 to nearest hundredth.

Step-by-step explanation:

Applying the Cosine Rule:

11^2 = 7^2 + 8^2 - 2*7*8 cos O

cos O = (11^2 - 7^2 - 8^2) / (-2*7*8)

= 8/-112

= -0.07143.

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