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Trigonometric Ratios of Special Angles, i don't really understand this, need a help.

Sagot :

the trigonometric ratios is like the unit circle.. there are special angles like 0,30,45 and 60 degrees.

in 30 degrees
when you press in the scientific calculator the sin30 degrees is 0.5 or one-half
cos30[tex] \sqrt{3}[/tex] over 2 and the tan30 is 1 over the square root of 3