Question: Use a sum or difference formula to find the exact value of the following. 11 x 11 T COS COS - sin sin 21 21

Use a sum or difference formula to find the exact value

of the following. 11 x 11 T COS COS - sin sin

Use a sum or difference formula to find the exact value of the following. 11 x 11 T COS COS - sin sin 21 21 OVO X

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