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exercicis de TRIGONOMETRIA - IES CAR de Sant Cugat

exercicis de TRIGONOMETRIA - IES CAR de Sant Cugat

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Carles Mallol Problemes i <strong>exercicis</strong> <strong>de</strong> <strong>TRIGONOMETRIA</strong> <strong>IES</strong> <strong>CAR</strong><br />

14. Calculeu les raons <strong>de</strong> , sabent que i són aguts i que i .<br />

Anàlogament:<br />

i<br />

i<br />

i amb la relació pitagòrica calculem el radi<br />

, per tant,<br />

Finalment calculem les raons <strong>de</strong>mana<strong>de</strong>s:<br />

O bé<br />

15. Expresseu el sinus, el cosinus i la tangent <strong>de</strong> en funció <strong>de</strong>l sinus, el cosinus i la tangent d’ .<br />

16. Agrupant convenientment <strong>de</strong>mostreu que:<br />

=<br />

=<br />

com volíem comprovar<br />

8

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