Two sides of a right triangle ABC (C is the right angle) are given. Find the indicated trigonometric function of the given angle. Give exact answers with rational denominators.Find cos A when a =  and c = 10.

A.
B.
C.
D.


Answer: A

Mathematics

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Graph the circle if possible.x2 + y2 = 100

A.

B.

C.

D.

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Find the x-intercepts.y = x2 + 4x

A. (0, 0) and (-4, 0) B. (0, 0) and (4, 0) C. (0, 0) and (0, -4) D. (-4, 0)

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Solve the equation in the interval [0,2?).

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Identify all values for which the expression is undefined.

A. 4, -4 B. 0 C. -2, -4 D. 2, 4

Mathematics