Trigonometry Answers

The value of three angles at a piont are
3y−45^0,y+25^0andy^0
. Find the value of y.
56^0
86^0
78^0
76^0

If tany= 0.404,where y is acute, find cos2y.

0.155
16^0
0.719
0.019

Point P and Q are respectively 24m north and 7m east of point R. What is the bearing of Q and P to the nearest whole degree.

52^0
164^0
134^0
159^0

If sinA =3/5
and sinB =5/13
. Where A and B are acute angles. Find (cosAcosB+sinAsinB)

63/65
43/56
3/5
2/5

A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed the angle of depression to the boat is 16°18'. When the boat stops, the angle of depression is 48°51'. The lighthouse is 200 feet tall. How far did the boat travel from when it was first noticed until it stopped? Round your answer to the hundredths place.

if secA = x+1/4x , prove that secA +tanA= 2x or 1/2x?

If 4sin^2x=1,where 0<x<360 , how many values does x take?

Round answer to two significant digits.

House B is located at a bearing of N67°E from house A. House C is 495 meters from house A at a bearing of S68°E. House B is located at a bearing of N11°W from house C. Find the distance from house A to house B

Round your answer to two significant digits.

A plane leaves airport A and travels 640 miles to airport B at a bearing of N32°E. The plane leaves airport B and travels to airport C 310 miles away at a bearing of S72°E. Find the distance from airport A to airport C