Math, asked by johananj07, 18 days ago

Prove that cos2 A +cos2 (A+120 ) +cos2 (A- 120 ) = 3/2

Answers

Answered by vineetmandhalkar

1

Answer:

= 3/2 + 1/2 ( 0 ) = 3/2

Step-by-step explanation:

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