Question

Find the exact value of sin 105º.

Answer 1

value is 1
(according to my calculator)

Answer 2

sin 105 = sin (45 + 60) = sin 45 cos 60 + cos 45 sin 60, or

= (1 / √2)(1 / 2) + (1 / √2)(√3 / 2)

1 + √3

= -------------

2√2

Explanation: