Question

if A = 30 degree (sinA - cos A)^2 1- sin 2A​

Answer 1

Answer:

sin30-cos30*21 -sin 2*30

(1/2 - √3/2)*21-sin 60

1-√3/2*21-√3/2

21-21√3-√3/2

21-22√3/2

21-18.26/2

2.74/2

1.37