1.

Sin theta =5 /3, 1-cos^theta =?​

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ANSWER:

given \: sina =  \frac{5}{3}  \\ we \: know \: that \:  {sin}^{2}a +  {cos}^{2} a = 1 \\  \\ 1 -  {cos}^{2} a =  {sin}^{2} a =  \frac{5}{3}  \times  \frac{5}{3}  =  \frac{25}{9}



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