А.(sinPi/8+cosPi/8)^-2cosPi/8sinPi/8б. sin^Pi/4cos(-Pi/3)+2cosPi/6

Question

А.(sinPi/8+cosPi/8)^-2cosPi/8sinPi/8
б. sin^Pi/4cos(-Pi/3)+2cosPi/6

Answer 1

Sin^2Pi/8 + 2cosPi/8sinPi/8 + cos^2Pi/8 - 2cosPi/8sinPi/8 = sin^2Pi/8 + cos^2Pi/8 = 1