If cos 2θ = \( \frac{1}{2} \), then the value of sin(75° − θ) will be:
\(\sqrt{2}\) + 1
\(\sqrt{2}\) - 1
\( \frac{1}{2} \)
\(\frac{1}{\sqrt{2}}\)
If '÷' stands for addition, '×' stands for subtraction, '+' stands for division, and '−' stands for multiplication, then which of the following equations is correct?
20 ÷ 12 + 6 × 5 − 2 = 12
18 × 12 + 6 ÷ 3 − 2 = 12
20 × 12 + 4 ÷ 3 − 2 = 12
20 × 12 + 6 ÷ 5 − 2 = 12