Which graph represents a phase shift of pi/2 units right for the graph of y=cos x

Solution:

we are given that

Here we are going to plot two curves one for cosx and the othere also of cosx but after making a phase shift of

When we do a phase shift by an angle of theta , in that case actaully we add angle negative theta .

For example when we shift the phase of sinx by we get  

Hence we are going to plot the curve of

Hence the correct option is B.

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

answer: c

because if you look at the chart you can see a pattern and compare it to the question he simplify out your

but i think the formula is f(x)=6x