Question

(ii) cos(180° - A) + cos (180° + B) + cos(180° + C)
- sin(90° + D) = 0​

Answer 1

Answer:

-cosA-cosB-cosC-cosD

-(cosA+ cosB+cosC+cosD

-cos(A+B+C+D)

Answer 2

Answer:

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Step-by-step explanation:

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