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        <h1> Pagrindinės funkcijų reikšmės </h1>
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    sin 0<sup>o </sup> = 0 , sin 30<sup>o</sup> = 1/2, sin 45<sup>o</sup>
    = √2/2 <br>
    cos 0<sup>o</sup> = 1; cos 30<sup>o</sup> = √3/2; sin 45<sup>o</sup>
    = √2/2 <br>
    tg 0<sup>o</sup> = 0, tg 30<sup>o</sup> = √3/3; tg 45<sup>o</sup> =
    1 <br>
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        <h1> Redukcijos Formulės: </h1>
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    sin<sup>2</sup> α + cos<sup>2</sup> α = 1, sin 2α = 2 sin α cos α;
    cos 2α = cos<sup>2</sup> α - sin<sup>2</sup> α <br>
    sin (90<sup>o</sup> - α) = cos α; cos (90<sup>o</sup> - α) = sin α
    tg (90<sup>o</sup> - α) = ctg α <br>
    sin (180<sup>o</sup> - α) = sin α cos (180<sup>o</sup> - α) = -cos α
    tg (180<sup>o</sup> - α)= -tg α
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