Answer:
Choice B. sin(B)=cos(90-B)
Step-by-step explanation:
That cofunction identity is the one you looking for...choice B.
If you aren't convinced or don't know that identity, then maybe this will help:
90-B is actually the same thing as saying A for this right triangle since A+B=90.
So choice B basically says sin(B)=cos(A)
Well let's find both sin(B) and cos(A)
sin(B)=b/c
cos(A)=b/c
Those are the same ratios!
So they are equal!
Answer:
The answer is C.
Step-by-step explanation:
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Answer:
19
Step-by-step explanation:
5/12 > 1/3 because 1/3 is equal to 4/12 and 5 is greater than 4
Answer:
The graph is missing, so there are two options m∠A = 36.87° or m∠A = 53.13°
Step-by-step explanation:
Assuming that 3 cm, 4 cm and 5 cm are the length of the sides of a triangle, then a right triangle is formed, in which 5 cm is the length of the hypotenuse and 3 cm and 4 cm are the length of the legs.
Angle A is either the angle between 4 cm and 5 cm sides or between 3 cm and 5 cm sides. For the first case:
cos(A) = adjacent/hypotenuse =
cos(A) = 4/5
A = arccos(4/5) = 36.87°
For the second case:
cos(A) = 3/5
A = arccos(3/5) = 53.13°