Step-by-step explanation:
We can prove the statement is false by proof of contradiction:
We know that cos0° = 1 and cos90° = 0.
Let A = 0° and B = 90°.
Left-Hand Side:
cos(A + B) = cos(0° + 90°) = cos90° = 0.
Right-Hand Side:
cos(A) + cos(B) = cos(0°) + cos(90°)
= 1 + 0 = 1.
Since LHS =/= RHS, by proof of contradiction,
the statement is false.
Answer:
Step-by-step explanation:
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Answer:
Step-by-step explanation:
<u>Use the law of cosines:</u>
<u>Substitute the values:</u>
Answer: This should be under the subject English or Art, not math.
Step-by-step explanation: Go motivation, if a little rude.
