That = (f(2) - f(-1) / 2 - -1 = 8 - 5 / 3 = 1 answer
Answer:
1-
sinA = perpendicular / hypotenuse
sinA = 40 / 50 OR 4/5
cosA = base / hypotenuse
cosA = 30 / 50 OR 3/5
ANS - OPTION(D) 4/5 , 3/5
2-
ANS - OPTION(C) √2 (You will need to learn the trigo angle tables for these questions)
3-
Using Pythagoras theorem-
15^2 = b^2 + 9^2
225 = b^2 + 81
b = √144
b = 12
OPTION(C) b = 12
4-
First we need to find the height of the triangle. To do that we need to take the triangle on the left and use cos30
cos30 = b / 6
√3/2 = b /6
3√3 = b
b = 3√3
and now we can use tan45
tan45 = 3√3 / x
1 = 3√3/x
x = 3√3
ANS - OPTION(A) 3√3
Hope this helps!!!
Answer:
i think think a square would have 6 as a surface area
Step-by-step explanation:
soryr if im wrong
Answer:
Option C is correct.
Step-by-step explanation:
Here, boy knows his height and shadow length
And he know the length of tree shadow.
We need to find height of the tree.
And tree and it's shadow makes right angle at the point of intersection.
So, S A S rule works here.