Question Simplify the expression −cos(2x) Evaluate sin2(x)−cos2(x)Use sin2t=1−cos2t to transform the expression 1−cos2(x)−cos2(x)Subtract the terms 1−2cos2(x)Transform the expression More Steps Evaluate −2cos2(x)Use 2cos2t=cos(2t)+1 to transform the expression −2×21+cos(2x)Cancel out the common factor 2 −(1+cos(2x))Calculate −1−cos(2x) 1−1−cos(2x)Solution −cos(2x) Show Solution Factor the expression (sin(x)+cos(x))(sin(x)−cos(x)) Evaluate sin2(x)−cos2(x)Solution (sin(x)+cos(x))(sin(x)−cos(x)) Show Solution
Algebra
Calculus
Trigonometry
Matrix Algebra Calculus Trigonometry Matrix