Cos(40) = x over 13
what is the answer?
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x = 9.9586

Step-by-step explanation:

Your calculator will tell you that cos(40)= 0.7660 You get that from your calculator.

Cos(40)/1 = x/13

I put the 1 in so that it would change to a proportion, which might make the question more understandable.

0.7660 / 1 = x / 13         Cross Multiply. You will always be doing something like this.

0.7669 * 13 = x*1

x = 9.9586

so the possibilities of the measurement of the side of the triangle are either it is longest side or not the longest side

when it is the longest side

s < 25 + 35s < 60

if it is not the longest side

35 < 25 + s10 < sso 10 < s < 60so the perimeter70 < p < 130