use trigonometric identities to solve each equation within the given domain

1 - cos(x) = 2-2 sin2(x) from (-pi, pi)

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

Evaluate cos2θ for cosθ = square root of 3/2

Given the equation y − 4 = three fourths(x + 8) in point-slope form, identify the equation of the same line in standard form. −three fourthsx + y = 10 3x − 4y = −40 y = three fourthsx + 12 y = three fourthsx + 10