Mathematics i hope you help me with this

B.  

Explanation:

The coefficients tacked onto the trig functions tell us how vertically stretched the curves are. The dashed curve, representing , is taller than the solid curve. Therefore must be larger than

For the sine curve, note how it is increasing after we pass through t = 0. This indicates we have as a positive number. The value of is positive because the point (0,k) on the cosine curve has k being positive.

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

correct answer:

b.(19,-2)