I believe the answer is b.
It is true that despite
the existence of research data that might inform policy about
development, political rarely discuss such data in their speeches. The reason is that the participants in the study and research must be protected from physical and psychological
harm and researchers
must obtain informed consent from participants before their involvement in a
study.
An example of basic trigonometric functions question is find tan
.
<h3>What are trigonometric functions?</h3>
The term trigonometric function is known to be made up of functions such as sine (sin), cosine (cos), tangent (tan), etc., that stands for the ratios of sides of all right triangles.
To solve for tan 
It will be
= 2
+ 
θ = 
θ = 
To know the right angle,
θ =
x 180/4 = 45⁰
tan θ = 1
Therefore, tan
= -1
Learn more about trigonometric functions from
brainly.com/question/24349828