Assertion : Sine and cosine function are perioic function
Reason: sinusoidal function repear its value after a definite interval of time

Options

A. If both assertion and reason are true and the reasopn is correct explanation of the assertion
B. If both assertion and reason are true and but not the correct explanation of assertion
C. If assertion is true but the reason is false
D. If both assertion and reason are false

Answer

A

Explanation

A function `f(t)` is sand to be particle of time period `T` if `f(t +T = f(t)`
All sine or cosine function are periodic Thus `y = A`
`sin omega t A cos omega t` particle of time period `T = (2pi)/(omega)`.