Answer:
-1/2
Step-by-step explanation:
Im not going to go into detail about how to compute sin30 and cos 30, but know that sine and cosine are just the ratios between the sides of a 30-60-90 triangle with a hypothenuse of 1.
With that being said:
sin^2 30 - cos^2 30
= (1/2)^2 - ((sqrt3)/2)^2
= 1/4 - 3/4
= -1/2
Answer: multiply 631.6 by 0.8 = 505.28
Answer:
Multiply 1240 by 1.15 to get 1426 students enrolled this year.
:
4-3=1 and 5-4= 1 so it's 4
