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Review the proof of sin(A-B) sinAcosB-cosAsin8
sin(4-8)=
Step 1: ces
cos(-4)+]
Step 2: ces-(4-]
Step 3: cos(-4) coss-sin(-A) sing
Step 4: sinAcos8-cosAsinB
How must the proof be rearranged for the steps to
logically follow each other?
O Step 3 should be step 1.
O Step 4 should be step 1.
O Steps 1 and 2 must be switched.
O Steps 1 and 3 must be switched.
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