The coefficient is 2, the first number being multiplied by a variable will always be the coefficient.
I don’t really know? What grade is this?
The answer is: [B]: " 45.5 degrees " .
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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 =
= 