Homework Help: Trig functions and such

Posted by Jon on Monday, February 11, 2008 at 11:49am.

1)Find the exact value of cot(-315)
A)1
B)square root of 2
C)square root of 2 over 2
D)2
I chose C

2)Find the exact value of sin(-pi/6)
A)-1/2
B)-square root of 3/2
C)-square root of 2/2
D)square root of 2/2
I chose A

3)In triangle ABC, C=30, c=22, and b=42. Find B.
A)73 degrees
B)107 degrees
C)77 degrees
D)15 degrees
I chose A

4)Find the area of triangle ABC, if A is 55 degrees, b=8 meters, and c=14 meters.
A)91.7 sq meters
B)32.1 sq meters
C)45.9 sq meters
D)56.0 sq meters
I chose C

5)Which triangle has two solutions?
A)A=130 degrees, a=19, b=11
B)A=45 degrees, a=4square root of 2, b=8
C)A=32 degrees, a=16, b=21
D)A=90 degrees, a=25, b=15
I chose C

Trig functions and such - Reiny, Monday, February 11, 2008 at 12:04pm
all ok except #1

cot (-315)
= cot 45
= 1/tan 45
= 1/1
= 1
Trig functions and such - Anonymous, Monday, July 7, 2008 at 1:11pm
In abc,c=60 degrees,a = 12,and b=5 . Find c.

Answer this Question

Related Questions

Math - There are no typos and no work b/c I don't know how to do them. ...
math - There are no typos and no work b/c I don't know how to do them. ...
Algebra - Use the quadratic formula to solve the equation. Give exact answers: ...
Algebra - Rationalize each expression by building perfect nth root factors for ...
trig - what is the exact value of cos(x+y) if tan=x sqare root 3 over 3 and sin ...
Math - Just need some help... Directions: Multiply or raise to the power as ...
College Algebra - I need some help with a handful of questions. I need to see ...
College Algebra - I need some help with a handful of questions. I need to see ...
Math PLEASE HELP ASAP - -PLEASE INCLUDE SOLUTIONS AND EXPLAIN HOW YOU DID IT ...
College Algebra help please - I need some help with a handful of questions. I ...

For Further Reading

First Name:
School Subject:
Answer: