Math, asked by ayushi6030, 9 months ago

Prove that
cos 55°+cos 65° + cos 75°=2cos 40°cos 35º.

Answers

Answered by rishitarawat2009

Answer:

Step-by-step explanation:

maths ..... which class ?

Answered by anupamkumars751

Step-by-step explanation:

11 classes maths books of up board

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