If cos £ = -4/9 with £ in Quadrant II, find sin £.
If cos £ = -4/9 with £ in Quadrant II, find sin £.
This is a precalculus question involving right triangle trigonometry
Using only the double angle identities how to solve for this? im stucked after 2cos^2 (2x) -1
I know that i should multiply something to it for it to become 2sinAcosA for me to be able to solve it. Unfortunately, if i multiply2/2 to it will just become 2/16 that will just bounce back to 1/8...
A bicycle tire has a diameter of 24 inches and is revolving at a rate of 10rpm. At t=0, a certain point is at a height of 0. What is the height of the point above ground after 3 seconds?
i know that cos(a-b) = cosacosb+sinasinb And cos(a+b) = cosacosb-sinasinb and cos(x+x) = cos^2x-sin^2x
the terminal side of theta lies on the line x - y = 0 in quadrant III. Find the exact value of tan theta
cosΘ+tanΘ=x, secΘ +cosΘ=y. Eliminate Θ. ...
A ship leaves a port at noon at a speed of 10 knots due west. After 4 hours the ship speeds up to 15 knots and changes direction to due south. How far is the ship from the port and what are the...
A kite with string length of 65 feet is anchored to the top of a 4 foot fence and is flying at angle of elevation of 61 degrees. How high is the kite above the ground?
An aeroplane leaves Airport A and flies due south for 352 km to Airport B. It then flies to Airport C, which is 63 degrees east of north of B, and 42 degrees east of south of A. Finally, it...
Please help me to answer ths question
ABCD is a tetrahedron whose horizontal base ABC is an equilateral triangle. The angle between each pair of slant edges is θ where tan θ = 5/12, and the length of these edges is a. Find the height...
A river running due east has straight parallel banks. A vertical post stands with its base, P, on the north side of the river. On the south bank are two surveyors, A who is to the east and B who is...
The x-coordinate or cosine for 45º or π/4 on a unit circle is sqrt(2)/2.
Thank you so much
You are to run a conduit diagonally across a parking lot that is 200 ft long and 60 ft wide. How much conduit will you need to complete this run?
Towers A and B are constructed on a horizontal plain . B being 200m above the plain . the angle of elevation of the top of tower A as seen from point C in the plain.(in the same horizontal plain with...
I chose to manipulate the left hand side. So i got 1+cos2x-cos2x-cos4x when i simplify it will be 1-cos4x i will break it into pieces so (1-cos2x)(1+cos2x) i can change the first term...
Trigonometric