The expression cos(270° - θ) can be rewritten using the co-function identity of cosine, which states that cos(90° - θ) = sin(θ).

So, cos(270° - θ) = cos(180° + 90° - θ) = cos(180° - (θ - 90°)).

According to the properties of cosine, cos(180° - θ) = -cos(θ).

Therefore, cos(270° - θ) = -cos(θ - 90°) = -sin(θ).

So, the best answer is -sin(θ).

Question

The expression cos(270° - θ) can be rewritten using the co-function identity of cosine, which states that cos(90° - θ) = sin(θ).

So, cos(270° - θ) = cos(180° + 90° - θ) = cos(180° - (θ - 90°)).

According to the properties of cosine, cos(180° - θ) = -cos(θ).

Therefore, cos(270° - θ) = -cos(θ - 90°) = -sin(θ).

So, the best answer is -sin(θ).

Knowee AI · Accepted Answer

The expression cos(270° - θ) can be rewritten using the co-function identity of cosine, which states that cos(90° - θ) = sin(θ).

So, cos(270° - θ) = cos(180° + 90° - θ) = cos(180° - (θ - 90°)).

According to the properties of cosine, cos(180° - θ) = -cos(θ).

Therefore, cos(270° - θ) = -cos(θ - 90°) = -sin(θ).

So, the best answer is -sin(θ).

Select the best answer.cos(270° - θ) =