Find value of sin2 11-25 - sin2 33-75 - sin2 56-25 - sin2 78-75

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Basic Inverse Trigonometric Functions

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find value of sin² 11.25 + sin² 33.75 + sin² 56.25 + sin² 78.75

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{sin}^{2} \frac{π}{10} + {sin}^{2} \frac{4 π}{10} + {sin}^{2} \frac{6 π}{10} + {sin}^{2} \frac{9 π}{10}

{sin}^{2} \frac{π}{8} + {sin}^{2} \frac{3 π}{8} + {sin}^{2} \frac{5 π}{8} + {sin}^{2} \frac{7 π}{8}

If ${sin}^{2} 5^{0} + {sin}^{2} 10^{0} + {sin}^{2} 15^{0} + . . . . . + {sin}^{2} 90^{0} =$

{sin}^{2} 5^{o} + {sin}^{2} 10^{o} + {sin}^{2} 15^{o} . . . . + {sin}^{2} 85^{o} + {sin}^{2} 90^{o} = 9 \frac{1}{2}

\frac{{cos}^{2} 34^{\circ} + {cos}^{2} 56^{\circ}}{{sin}^{2} 59^{\circ} + {sin}^{2} 31^{\circ}}

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