Question

if tan theta equal 20 by 21 show that 1 minus sin theta + cos theta by 1 + sin theta + cos theta equal 3 by 7

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

please mark as BRAINLIEST please

Answer 2

Refers to attachment ♡~