Question

Use the steps to determine the exact value of

Answer 1

To solve for sin(-135), the reference angle will be obtained as follow:
sin(-135)
=-sin(135)
=-sin(180-135)
=-sin 45
hence
the reference angle θ=45°

Answer 2

Answer:

The reference angle will be ${\theta}=45^{\circ}$

Step-by-step explanation:

To solve for $sin(-135)$, the reference angle can be obtained as follows:

= $sin(-135)$

=$- sin(135)$ (Because $sin(-{\theta})=-sin{\theta}$)

Thus, the above equation can be written as:

=$-sin(180-135)$

=$-sin45$

Hence , the reference angle will be ${\theta}=45^{\circ}$