Question

if tan theta + sec theta =1. prove that sec theta = l2 + 1/2l​

Answer 1

Answer:

dose that help?

Step-by-step explanation:

tanθ+secθ=l

tanθ=l−secθ

squaring on both sides, we get,

tan

2

θ=(l−secθ)

2

sec

2

θ−1=l

2

+sec

2

θ−2lsecθ

l

2

−2lsecθ=−1

l

2

+1=2lsecθ

⇒secθ=

2l

l

2

+1

​