35.2k views
0 votes
Which expression is equivalent to ½ sin 2theta for all values of theta

Which expression is equivalent to ½ sin 2theta for all values of theta-example-1
User Skeen
by
5.4k points

1 Answer

2 votes
Answer:
(1)/(2)sin2θ\text{ = cos\theta sin\theta \lparen option D\rparen}

Step-by-step explanation:
\begin{gathered} Given: \\ (1)/(2)sin2\theta \\ \\ We\text{ want to find the equivalent of the above for all values of \theta} \end{gathered}

To solve this, we need to find the trigonometry identity for sin2θ:


sin2θ\text{ = 2sin\theta cos\theta}

substitute the expression for sin2θ into the given trigonometry:


\begin{gathered} (1)/(2)sin2θ\text{ = }(1)/(2)(2sinθcosθ) \\ \\ (1)/(2)sin2θ\text{ = sin\theta cos \theta} \\ \\ Hence,\text{ the equivalence of }(1)/(2)sin2θ\text{ = cos\theta sin\theta \lparen option D\rparen} \end{gathered}

User Jatin Parmar
by
4.9k points