Answer:
see explanation
Step-by-step explanation:
Given
tan a =
= 
We require the hypotenuse h
Using Pythagoras' identity
h² = 9² + 40² = 81 + 1600 = 1681 ( take square root of both sides )
h =
= 41 , thus
sin a =
= 
cos a =
= 
Answer:
1)72=-8-5n
+8 +8
2)80=-5n
/-5 /-5
3)-16=n
Step-by-step explanation:
127.23cm should be the surface area!
It would be 0.3 kg, because 3 times a hundred and divided by a thousand is 0.3.