Question
Asked Dec 2, 2019
6 views

Find a cofunctions with the same value as the given expression

cos(7π/4+x)

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Expert Answer

Step 1

Consider the given expression

7T
-+x
cos
4
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7T -+x cos 4

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Step 2

Now

...
77T
27T
4
4
Then
7
-+ x = cos27
4
cos
-+x
4
(2-(-))
= cos 27T
4
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77T 27T 4 4 Then 7 -+ x = cos27 4 cos -+x 4 (2-(-)) = cos 27T 4

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Tagged in

Math

Trigonometry