Question

solve this quetion..

Answer 1

SOLUTION:-

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Answer 2

Hey user..

${sin}^{2} 20 + {sin}^{2} 70 \\ {sin}^{2} (90 - 70) \ + {sin}^{2} 70 \\ {cos}^{2} 70 + {sin}^{2} 70 \\ 1$