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18-08-2020
Mathematics

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if sina4/5 find cosa

Respuesta :

theblxckpxrxderbx theblxckpxrxderbx

18-08-2020

Answer:

cosa = 3/5

Step-by-step explanation:

Use Trignometrical identity cosa = √ 1 − sin ^2a

cos a = √ 1 − 16 /25 = √ 9 /25 = 3 /5

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