Question

plzzz.help m for this 4 questions u will get 50 point

Answer 1

hope this will help uh ...
nd plzz mark as brainliest ....

Answer 2

Answer:

see the  steps

Step-by-step explanation:

√{(1+cosθ)/(1-cosθ)}+√{(1-cosθ)/(1+cosθ)}

=(√1+cosθ×√1+cosθ+√1-cosθ×√1-cosθ)/(√1-cosθ×√1+cosθ)

={√(1+cosθ)²+√(1-cosθ)²}/√(1-cos²θ)

=(1+cosθ+1-cosθ)/√sin²θ

=2/sinθ

=2cosecθ (Proved)