Coterminal/Ref Angles/Cofunctions/Quadrants
The reference angle for -230°.
What is 50°?
18° converted to radians.
What is π/10 radians?
List the 3 main Pythagorean identities
What is sin^2x+cos^2x=1; tan^2+1=sec^2x; 1+cot^2=csc^2x;
Θ if (2cos(x)-1)(cos(x)-2)=0.
What is π/3, 5π/3?
Side b if
A=14°, B=35°, a=10cm
What is 23.7 cm?
The coterminal angle (between 0° and 360°) of 640°.
What is 280°?
14π/12 converted to degrees.
What is 210°?
Simplify sinx+(cotx)(cosx)
What is cscx?
Θ given 2csc(x)+4=0.
What is 7π/6 and 11π/6?
Area of a triangle with side lengths of
3ft, 7ft, and 8ft.
What is 10.4 sq.ft?
The quadrant where csc(x)<0 and sec(x)>0.
What is QIV?
The height of a tower if the angle of depression from the top of a tower to a point on the ground 30 meters from the bottom of the tower is 32°
What is 18.75 meters?
Simplify cosx (1+tan^2x)
What is secx?
Two possible values for csc(Θ)
given that
cos(Θ)=5/13
What is 13/12 and -13/12?
Angle C given that
a-12, b=10, and c=20
What is 130.54°?
The cofunction of sin(77°).
What is cos(13°)?
The length of an arc intercepted by a central angle Θ=30° in a circle or radius r=5 in.
What is 2.6 in?
Simplify (cscx+cotx)(1-cosx).
What is sinx?
sin(2Θ) given that Θ is in QII and cos(Θ)=-3/5.
What is -24/25?
The distance between two planes that leave from an airport together traveling on courses that have an angle of 100° between them if each travels one hour at 350 mph.
What is 536 miles apart?
The reference angle for 31π/9.
What is 4π/9?
The area of a sector if the central angle Θ=45° and the radius r=10 meters.
What is 39.3 sq. meters?
Simplify (sinx+cosx)(tanx+cotx).
What is cscx+secx?
x given that 1+2cos(2x)=0.
x=π/6, 5π/6, 7π/6, 11π/6?
The angle between 2 vectors
u=<−5,2> and v=<7,−10>
What is 146.8°?