A tree casts a 20ft shadow, the angle of elivation of the suns rays is 40, find the height of the tree
30.96 ft
100
solve 2cos-2=0
x= -pie/3 x=5pie/3
100
find the unit vector v=<-2,2>
<-1/square root 2, 1/square root2>
200
Find this Sin 2pie/3
square root of 3/2
200
What does Sin5 equal
-1
200
The sonar of a navy cruiser detects a submarine thats 4000ft from the crusier. The angle below the water line and the sub is 34 degrees. how deep is the sub.
2,236.77 feet
200
solve sin^2x=3cos^2x
x=pie/3 and x=2pie/3
200
unit vector for v=4i-3j
<4/5, -3/5>
300
Tan=11pie/6 what does cosine equal?
square root 3/2
300
What is sin pie/4 equal
.707
300
An amateur radio operater erects a 75-foot vertical tower for an antenna. Find the angle of elevation to the top of the tower at at point on level fround 50 feet from its base.
56.31 degrees
300
3tan1/2+3=0
x=3pie/2 and 7pie/2
300
<2,2>times<-3,4> state whether the result is a vector or a scarlar
<-12,16> four vectors
400
Cosine=square root 2 what does tangent equal?
3pie/2
400
What is cosine -3 equal
-.99
400
west A ship is 45 miles east and 30 miles south of port. If the captain wants to sail directly to port what bearing should be taken.