Answer:
Step-by-step explanation:
83bc i did the test
Your a should be 30
180-97-53 = 30
5. is 19.53 Use the Pythagorean Theorem. The length of the ladder is the hypotenuse and 19 is the vertical side and the 4.5 is the horizontal side.
7. y= 20.4
I don't know the rest.
Answer:
Step-by-step explanation:
First you mean: cos2x = (cosx)^2
For A. 2(cosx)^2-1 = 1 - 2(sinx)^2
we have (cosx)^2 + (sinx)^2 = 1, This is an identity
For B. secx cscx(tanx + cotx) = sec2x + csc2x
So the B is an identity.
For C, I do not understand the ?
For D secax is what?