HELP ASAP PLZ Given sinx = 2/3 and cos < 0 a) Use double identities to find the exact values of sin2x and cos2x

I got cos2x =1/9 and sin2x =

I'm just confused on how to do b & c.

b) Use a Pythagorean Identity to verify the answers you found for sin2x and cos2x.

c) Use a Ratio Identity to find tan2x. Do not use the double angel identity for tangent.

Which is an equation for the nth terms of the sequence 12,15,18,21

The table below represents a linear function f(x) and the equation represents a function g(x): x f(x) −1 −5 0 −1 1 3 g(x) g(x) = 2x − 7 part a: write a sentence to compare the slope of the two functions and show the steps you used to determine the slope of f(x) and g(x). (6 points) part b: which function has a greater y-intercept? justify your answer. (4 points)

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.