Mathematics: Use the cosine sum and difference identities to find the exact value. cos(5pi/12)

Use the cosine sum and difference identities to find

Ответ:

mlstogsdill05

07.01.2022

5π/12 = (5 · 180°) : 12 = 75°
cos 75° = cos ( 45° + 30° )= cos 45° cos 30° - sin 45° sin 30° =
=√2/2 * √3/2 - √2/2 * 1/2 = $\frac{ \sqrt{6} }{4} - \frac{ \sqrt{2} }{4}= \frac{ \sqrt{6} - \sqrt{2} }{4}$
=(2.4495 - 1.4142): 4 = 0.258825

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Ответ:

dlewis9632

19.01.2022

Mathematics

m=1 (0,3)

Step-by-step explanation:

m=1

slope is 1 because from left to right the line goes up and you move one 1and one to the left so m=1/1 =1

y-intercept is at (0,3) because is where the line intersects the y-axis

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Use the cosine sum and difference identities to find the exact value.

cos(5pi/12)

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