Question

sin^2 1 +sin^2 3+ sin^2 87 +sin^2 89​

Answer 1

Answer:

2

Step-by-step explanation:

${sin}^{2} 1 + {sin}^{2} 3 + {sin}^{2}87 + {sin}^{2} 89$

${sin}^{2} (90 - 89) + {sin}^{2} (90 - 87) + {sin}^{2} 87 + {sin}^{2} 89$

${cos}^{2} 89 + {cos}^{2} 87 + {sin}^{2} 87 + {sin}^{2} 89$

$1 + 1$

$2$