Question

75 cos ^2 x- 34 cos x + 3 =0

Answer 1

factorise the equation in term of (ax+c)(bx+d)=0

Answer 2

i dont know how to factor

Answer 3

if u hav Ax^2 + Bx +C = 0
then,
x= -B/2a + sqrt(B^2-4AC)/2A or x= -B/2A - sqrt(B^2-4AC)/2A

Answer 4

so using the quadratic formula with that problem how would you do that

Answer 5

u substitute the A,B,C from ur problem into the formulae

Answer 6

can you show me

Answer 7

compare: 75 cos ^2 x- 34 cos x + 3 = Ay^2 + By +C
therefore:
A=75, B=-34, C= 3 and y=cos x