Find the exact value of the expression if θ = 45°. Do not use a calculator.
-$f ( \theta ) = \sin \theta \quad$ Find $3 f ( \theta )$.
A) $\frac { 3 \sqrt { 2 } } { 2 }$
B) $- \frac { \sqrt { 2 } } { 2 }$
C) $- \frac { 3 \sqrt { 2 } } { 2 }$
D) $\frac { \sqrt { 2 } } { 2 }$

Question

Quizplus · Accepted Answer

For θ = 45°, $\sin \theta = \frac{\sqrt{2}}{2}$. Therefore, $3 f(\theta) = 3 \sin \theta = 3 \times \frac{\sqrt{2}}{2} = \frac{3\sqrt{2}}{2}$.

Find the Exact Value of the Expression If θ = f(θ)=sin⁡θf ( \theta ) = \sin \theta \quadf(θ)=sinθ

Find the Exact Value of the Expression If θ = $f ( \theta ) = \sin \theta \quad$