Answer:
3. LAW OF COSINE
4. LAW OF COSINE
Step-by-step explanation:
3. cos(A) = ( b^2 + c^2 - a^2 ) / 2bc
4. a^2 = b^2 + c^2 - 2bc•cos(A)
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Answer:
3. LAW OF COSINE
4. LAW OF COSINE
Step-by-step explanation:
3. cos(A) = ( b^2 + c^2 - a^2 ) / 2bc
4. a^2 = b^2 + c^2 - 2bc•cos(A)