Where does the pythagorean identity sin2 θ + cos2 θ = 1 come from? how would you use it to find the sine cosine and tangent values of the angle?

Consider right triangle ABC wit hright angle C. Then by the Pythagorean theorem,

Divide this equality by

Note that

Then

Suppose that you know the sine of the angle, then tha cosine of the angle can be determined as

If you divide the equality by the you get

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step-by-step explanation:

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40