Question

Review the proof of the identity cos(π − A) = −cosA.

Answer 1

Answer:

error in step 1

Step-by-step explanation:

well where is does the step not make sense?

remember cos(pi) = -1 and sin(pi)=0

that means step 1 is strange... it didn't distribute properly

it should have been:

cos(pi) - cos(A)

hope that helps! ^-^

Answer 2

Answer: Step 1 on EDGE2020