math 1022 test 3
which of the following is not a valid double angle formula for cosine?
cos20=2 sin^20 - 1
which of the following statements is true?
it is possible for a trig equation to have general solutions but not have a solution on the interval [0,2pi)
which of the following can best be evaluated using half angle formula for the sine function
sin (1/2 cos^-1(-2/3))
which of the following is correct difference formula for the sine function?
sin (a-B)= sinacosB +cosasinB
which of the following is not a trig equation that is linear in form?
sin0cos0=-1/2
if q/2 is an angle with a terminal side lying in quadrant 4, then which of the following expressions is not equivalent to tan (a/2)?
square root(1-cos a/1+ cos a)
which of the following is not a valid strategy for solving the given equation?
to solve the equation cos^2=sin0cos0, first divide both sides by cos 0
if a/2 is an angle with a terminal ice lying in quadrant 3, then which of the following expressions is equivalent to sin (a/2)?
- square root(1-cos a/2)
which of the following can best be evaluated using the sum formula for the sine function?
sin(tan^-1+ cos^-1 square root (3)/2
which of the following is the correct sum formula for the tangent function
tan (a+B)= tan a+tan B/ 1-tanatanB
which of the following is the correct difference formula for the tangent function
tan (a-B)= tan a- tan B/1+ tanatanB
if -1<b<0, then which of the following statements best describe the solution to the equation cos0=b on the interval [0,2pi)?
there are exactly 2 solutions to the equation cos0=b on the interval [0,2pi). one solution is 0=pi-cos^-1(-b), the other solution is 0=pi+cos^-1(-b)