関連ワード:
is cos 2 equal to 1 sin 2 is cos 2x equal to 1 sin 2x is cos squared equal to 1-sin squared does cos 2x equal 1 sin 2x is 1 cos 2 x equal to sin 2 x cos 2 theta is equal to 1 2 sin square theta does cos squared equal 1-sin squared does 1 cos 2 equal sin 2 cos 2x is equal to 1 minus 2 sin square x 1 cos 2x is equal to 2 sin square x
