Need help with trig in pic

A. cos α = – 3/5

B. Sin β = √3/2

Step-by-step explanation:

A. To find the exact value of cos α , we must obtain the Hypothenus for the triangle.

Please attach photo for explanation.

B. To find the value of sin β, we must determine the opposite in the triangle. Please see attached photo for further details.

what level of math? also i don't need to be paid if i can you.

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct