kamalachhettri123 kamalachhettri123
  • 18-08-2020
  • Mathematics
contestada

if sina4/5 find cosa
​

Respuesta :

theblxckpxrxderbx
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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