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Find the exact values of cos

- radians and sin
4

- radians ]
4

Square root 2/2- Square root/2
-1/2, Squareroot3/2
-square root2/2 times square root2
-square root3/2, 1/2

1 answer

-1/2, -√3/2
-√3/2, -1/2

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