Explain how to find tan theta is sec theta =sir 39 /7 and sin theta <0

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how