
Victoria V. answered 04/26/19
Tutor
5.0
(402)
Math Teacher: 20 Yrs Teaching/Tutoring CALC 1, PRECALC, ALG 2, TRIG
If you re-write this as [sin(45)]2, it makes it clearer that you must find the sin(45) = (√2/2) and then square it.
(√2/2)2 = 2/4 = 1/2
Answer is 1/2