Question 11 of 40 5 points given right triangle abc, which of the following statements must be true? check all that apply. a. sin c = cos(a-90°) b. sin c = cos(90° - a) oc. za and 2c are complementary d. sin c - cos(90°-c)

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?