Question

An incomplete proof of 1 - tanØcosØ / cscØ is shown. Which of the following expressions could be used to complete the second step of the proof?

Answer 1

Answer: trigonometric identities

1 C sin^2

2 B csc x(csc x-1)

3 D 1-sin theta/ csc theta

4 D tan x sin x

5 A cos x cot2 x

Answer 2

D) 1 - sin(Ф)/csc(Ф)

Explanation:

We have to simplify RHS of the step 1

In the numerator, cos(Ф) and cos(Ф) get cancelled.

1 - sin(Ф)/csc(Ф)

The answer is D) 1 - sin(Ф)/csc(Ф)

Hope this will helpful.

Thank you.