cos(-9∏/4)=
cos(-9∏/4)=
veena chunduru , 13 Years ago
Grade
Algebra> trigonometric ratios...
2 Answersshivang belwariar
cos(-9∏/4)= cos(9∏/4)= cos(2∏+∏/4) = cos(∏/4) =cos(45) = 1√2
PLEASE APPROVE MY ANSWER BY CLICKING YES BELOW THIS .
Shrawan Kher
cos(9pie/4)
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