Question

5.
sin 40 can be written as​

Answer 1

Answer:

calculate sin (40)

determine quadrant :

since our angle is between 0 and 90 degrees , it is located in quadrant 1 . in the first quadrant, the values for sin ,cos and tan are positive.

determine angle type :

40 is an acute angle since it is less than 90°

sin(40): 0.64278760907544

write sin(40) in term of cos

since 40° is less than 90, we can express this in term of a cofunction.

sin(∅) = cos ( 90 - ∅)

sin(40)= cos (90-40)

sin(40)= cos (50)

Step-by-step explanation:

hope it helps you dear ☺️!!!!!