Posted by Jon on Sunday, February 10, 2008 at 3:21pm.
1)I have a right triangle. the hypotenuse is 7 the opposite leg is x and an angle is 32.
Which equation can be used to find x?
A)sin32=x/7
B)cot32=7/x
C)tan32=x/7
D)cos32=x/7
I chose D
2)A right triangle 26 is the hypotenuse,opposite leg is 15.
Find A to the nearest degree.
A)55
B)30
C)35
D)60
I chose C

Trigonometric functions  Damon, Sunday, February 10, 2008 at 3:39pm
1 disagree
Sin 32 = opposite / hypotenuse
sin 32 = x / 7
2
sin A = 15/26
sin A = .577
A = 35.23 agree choose C

Trigonometric functions  Guido, Sunday, February 10, 2008 at 3:46pm
For question 1, we need a trig function that equals opposite over hypotenuse.
Which one?
Tangent = OPP/HYP
To find x we use CHOICE (C).
============================
For question 2, we are looking for angle A.
We use tan(A) = OPP/HYP
tan(A) = 15/26
Since we are looking for an angle, we MUST use the inverse key. Keep that in mind!
Let arc = INVERSE
Then tanarc = the inverse of tangent
A = tanarc(15/26)
A = 29.98163937
When we round the decimal number above to the nearest degree, we are really rounding the whole number (our 29) to the nearest tens place.
What is 29 rounded to the neaesrt tens place?
Final Answer: 30....Choice (B)
Done!

Trigonometric functions  Guido, Sunday, February 10, 2008 at 3:48pm
Jon,
I made a mistake.
Sorry!
sine = OPP/HYP NOT tangent.
It was a simple mistake.
Damon got it right.
Thanks, Damon!
Answer This Question
Related Questions
 Algebra 2 Honors  Hi, I'd like some help with one of the questions on my math ...
 Geometry  I need help in this problem: A 14foot ladder is leaning against a ...
 math  I have 14 questions and I was wondering if someone could check my answers...
 Evaluationrepost  Reposting because it has gone down to the second page! ...
 Math  If the hypotenuse of a right triangle is 13 and one of its legs is 5, ...
 trigonometric functions  im compeletely lost with the trigonometric functions...
 math  The longer leg of a right triangle is 3 more than the shorter leg. The ...
 trig  the leg opposite the 50 degree angle in a right triangle measures 8 ...
 algebra  One more triangle question,please. In this triangle,the short leg is x...
 math  Plane A which contains an isosceles right triangle forms a dihedral angle...
More Related Questions