Question

if tan theta=1, find sin 20 and cos 20

Answer 1

tanθ = 20/21

so, sinθ =20/29

cosθ = 21/29

now,

(1-sinθ+cosθ)/(1+sinθ + cosθ)

putting the values,

[1 - (20/29)+(21/29)]/[1 +(20/29)+(21/29)]

=(29-20+21)/(29+20+21)

=30/70

=3/7

Hope this answer helps you!!!!!

Answer 2

Answer:

3/7 is the correct answer of this sum