question_answer

Assertion             :       Sine and cosine functions are periodic functions.  Reason                 :       Sinusoidal functions repeats it values after a definite interval of time.

A)             If both assertion and reason are true and the reason is the correct explanation of the assertion.

B)             If both assertion and reason are true but reason is not the correct explanation of the assertion.

C)             If assertion is true but reason is false.

D)             If the assertion and reason both are false.

E)             If assertion is false but reason is true.

Correct Answer: A

Solution :

                   A periodic function is one whose value repeats after a definite interval of time. \[\sin \theta \] and \[\cos \theta \] are periodic functions because they repeat itself after \[2\pi \] interval of time. It is also true that moon is smaller than the earth, but this statement is not explaining the assertion.