\tan( \alpha \div 2) = 5 \div 2 \: and \: \tan( \beta \div 2) = 3 + 4 \: then \: \cos( \alpha + \beta ) =

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 \tan( \alpha  \div 2)  = 5 \div 2 \: and \:  \tan( \beta  \div 2)  = 3 + 4 \: then \:  \cos( \alpha  +  \beta  )  =

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Aubrey 4 weeks 2021-08-23T04:53:16+00:00 1 Answer 0 views 0

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    2021-08-23T04:54:48+00:00

    Answer:

    please see in Google and found that the answer

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