anonymous
  • anonymous
Which statement is true? In any right triangle, the sine of one acute angle is equal to the cosine of the other acute angle. In any right triangle, the sine of one acute angle is equal to the sine of its complementary angle. In any right triangle, the cosine of one acute angle is equal to the cosine of its complementary angle. In any right triangle, the sum of the sine of one acute angle and the cosine of the other acute angle is 1.
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
D i think
anonymous
  • anonymous
yea thanks man
wolf1728
  • wolf1728
No I don't think D sine 45 = .707 cosine 45 = .707 Sum does NOT = 1

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wolf1728
  • wolf1728
sine 10 = .17365 cosine 80 = .17365 sum NOT = 1
wolf1728
  • wolf1728
Seems like it might be A Not sure
wolf1728
  • wolf1728
Anyone else care to give an answer?
anonymous
  • anonymous
@wolf1728 is correct, it's A. Those are cofunction identities. \[\cos(90^o-\theta)=\sin \theta\] \[\sin(90^o-\theta)=\cos \theta\]

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