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.

Question

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.

anonymous · Answer

@TheSmartOne

thesmartone · Answer

In triangle all the angles have to equal to 180. So if one angle is 90 what is the sum of the other 2 angles?

thesmartone · Answer

The other 2 angles have to add up to be 90...

thesmartone · Answer

And any angles under 90 are acute angles.

anonymous · Answer

oh i thought the other two angles would be 45

anonymous · Answer

ya your right

thesmartone · Answer

They could be 45-45 or they could be 50-40

thesmartone · Answer

They can be any two numbers that add up to 90.

anonymous · Answer

so what is sine and cosine?

thesmartone · Answer

Sine and Cosine are terms in trigonometry.

anonymous · Answer

idk what your getting at

thesmartone · Answer

Sine= Opposite over Hypotenuse
and Cosine =adjacent over hypotenuse
that's all i learned so far about trig.
I wish I could help you finish your question but I haven't take trig yet...

anonymous · Answer

ive got a math teacher in here now il ask him to help thanks for your help

xapproachesinfinity · Answer

$sin(90-\alpha)=cos(\alpha)$ this is what you need

anonymous · Answer

what does that do for me?

xapproachesinfinity · Answer

it's related to you question about trig relations! that's what your question is asking you

anonymous · Answer

ya but im not even suppose to be in trig so idk what im doing about this

xapproachesinfinity · Answer

what you mean you are not trig! your question is clearly asking you about 
right triangle trigonometry?!

xapproachesinfinity · Answer

all the given answers are in one scope you know all of them deal with right triangle trig

anonymous · Answer

i know but my teachers put me in a higher class than im suppose to be ive never done trig in my entire life

xapproachesinfinity · Answer

this is not entirely trig class i suppose it's algebra

anonymous · Answer

no its geometry but it has trig in it

xapproachesinfinity · Answer

idk what you mean by your teacher put you in higher class here that what you supposed to be in. does ur teacher has the authority to do such! i don't think so

xapproachesinfinity · Answer

my friend algebra is geometry itself!
the point is you are in the right class

xapproachesinfinity · Answer

as long as you studied Since and Cosine as ratios then you suppose to deal with this

xapproachesinfinity · Answer

what is $sin(\pi/3)$

xapproachesinfinity · Answer

or $sin(60^\circ)$

xapproachesinfinity · Answer

|dw:1412265431015:dw|