Sin63*cos27+cos63*sin27

Question

Sin63*cos27+cos63*sin27

Answer 1

Формула синуса суммы: sin(x+y)= sin(x)·cos(x)+sin(y)·cos(x)

sin(63)·cos(27)+cos(63)·sin(27)= sin(63+27)= sin(90)= 1