Answer: 1
Step-by-step explanation:
Alright, lets get started.
The given expression is :

As per Pythagorean identity,

taking 1 to left side and
to right side

Now plugging the value of
in given expression

cosx will be cancelled, so

Multiplying -1 in both sides, it will equal to
........................ Answer (C)
Hope it will help :)
Exact form: 5/2
Decimal form: 2.5
Mixed number form: 2 1/2
Hope this helps:)