Question

Sin 20=Cos= *




50

20

90

70​

Answer 1

Determine quadrant:

Since our angle is between 0 and 90 degrees, it is located in Quadrant I In the first quadrant, the values for sin, cos and tan are positive.

Determine angle type:

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

sin(20) = 0.34202014295086

Write sin(20) in terms of cos

Since 20° is less than 90, we can

express this in terms of a cofunction

sin(0) = cos(90 - 0)

sin(20) = cos(90-20)

sin(20) = cos(70)

Answer 2

Answer:

sin 20

or sin(90-70)

or cos 70