Cos2x = (cosx)^2 - (sinx)^2;
sin2x = 2sinxcosx;
Then, (2cos2x)/(sin2x) =2[ (cosx)^2 - (sinx)^2 ] / (2sinxcosx) = [ (cosx)^2 - (sinx)^2 ] / (sinxcosx) = (cosx)^2 / (sinxcosx) - (sinx)^2 / (sinxcosx) = cosx/sinx - sinx/cosx = cotx - tanx;
Answer:
-4 and -10
Step-by-step explanation:
-4 * -10 = 40 because two negatives multiplied equals a positive.
-4 + -10 = -14 because when two negatives added together, you get a negative.
i can help you with 1 .Sorry that i cant do 2 because number 2 doesnt have all the question in the photo.
Answer:
Step-by-step explanation:
V=4/3πr³
v = 1.33*3.142*9³
v = 3046.39in³
New scale = 3046.39*1.5
= 4,569.59in³
Answer:
II only ⇒ QR ≅ SP
Step-by-step explanation:
It definitely can’t be I or III becasue SR is smaller than QR, and PR is longer than QR. So both of those lines are not congruent to QR because they have different lengths.