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lakkis [162]
3 years ago
7

Find the exact value of cos0. Express your answer as a fraction.

Mathematics
1 answer:
RoseWind [281]3 years ago
7 0

Trigonometric Functions -

\cos =  \frac{adjacent}{hypotenuse}

Find the opposite side, first of all.

Pythagorean Theorem -

a^{2}  + b^{2}  = c^{2}

Input the hypotenuse and opposite sides to find b^2.

49 +  {b}^{2}  = 64

Minus 49 from equations to get b^2 by itself.

{b}^{2}  = 15

Square root b^2 and 15 to get b by itself.

b =  \sqrt{15}

Now we can get to the trigonometry functioms!

\frac{ \sqrt{15} }{8}

Divide them up, then find the percentage!

48% or...

\frac{ \sqrt{15} }{8}

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