Question: Use a sum or difference formula to find the exact value of the following. 4TC 6T 4TC COS COS + sin sin 7 21 7

Use a sum or difference formula to find the exact value
of the following. 4TC 6T 4TC COS COS + sin sin 7

Use a sum or difference formula to find the exact value of the following. 4TC 6T 4TC COS COS + sin sin 7 21 7 21

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