Math, asked by ritikdhiman891, 2 months ago

cos(m+n)A+cos(m-n)A=2cosmA.cosnA proved it

Answers

Answered by Horse2702
0

Answer:

t erwagfg wtrrfr e en e3 3nr4 23 j 4cn wtf 3 jenejsw enrn

                                                                                                         

Step-by-step explanation:

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