Question

Please solve 9th and 10th question..

Answer 1

Answer:

45 degree

Step-by-step explanation:

Answer to question 10:

Given equation:

cosθ/(cosecθ + 1) + cosθ/(cosec θ -1) = 2

Taking LCM,

(cos θ(cosec θ -1) + cos θ(cosec θ + 1))/(cosec θ +1)(cosec θ -1) =2

or (cos θ cosec θ - cos θ + cos θ cosec θ -cos θ)/(cosec² θ - 1)  = 2

or (2 cos θ cosec θ) / cot²θ =2

or (cos θ/sin θ)/cot² θ = 1

or cot θ / cot²θ = 1

or 1/ cot θ =1

or tan θ =1

or θ = 45 degrees