Упростить: cos^2 * (3п/2) * ctg^2 a + sin^2 a - 1

Question

Упростить:
cos^2 * (3п/2) * ctg^2 a + sin^2 a - 1

Answer 1

I hope this helps you



cos(3π/2)=0


0². ctg²a+sin²a-1


1-cos²a-1


cos²a