Please post the complete problem ... I will be happy to answer your question

a) definition of cosine in right triangle

b) definition of sine in right triangle

c) definition of tangent in right triangle

d) Corresponding sides of congruent triangles are equal.

e) definition of equilateral triangle

Hello do you see the answer above^

I posted the statements and reasons and below the answers in another reply...

Correct answer is

Ok thank you!

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