Question

what is the value if cos 585 degrees?

Answer 1

Answer:

$\red {Value \: of \: cos 585 \degree } \green {=- \frac{1}{\sqrt{2}}}$

Step-by-step explanation:

$Value \: of \: cos 585 \degree \\= cos ( 360 + 225 )\\= cos 225 \\= cos ( 270 - 45 )\\= - sin 45\degree \\= - \frac{1}{\sqrt{2}}$

Therefore.,

$\red {Value \: of \: cos 585 \degree } \green {=- \frac{1}{\sqrt{2}}}$

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Answer 2

Answer:

Answer is.. 1/root 2

Step-by-step explanation:

Hope this helps u to understand