1.

Find the value of cos (-1710°)​

Answer»

ANSWER:

Step-by-step EXPLANATION:

\cos (-1750)^\circ\\\\=\cos 1750^\circ\\\\=cos (4\times 360+270)^\circ\\\\=\cos 270^\circ\\\\= -\cos ( 180+90)^\circ\\\\=-\cos 90^\circ\\\\=0



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