(a)

The function and and the inveral .

Graph :

Graph the functions and in the interval .

(b)

The function and .

Solve .

Trignometric value : .

and

and

and

Point of intersections are and .

Graph :

Graph the functions and .

Plot the point of intersection and .

Observe the graph,

The intersection of the function and are drawn in the interval of and intersection points are shown.

The intersectionpoints are

(c)

The function and

Solve .

Trignometric value : .

and

and

and

The solution is .

(d)

The function and .

The intersection points are  and

when .

Graph :

Graph the functions and .

Plot the point of intersection and .

Shade the region between .

.

(a) The function and ,

(b) The intersection points are and .

Graph of the functions  , and  point of intersection and :

(c) The solution is .

(d)

Graph the functions and .

Plot the point of intersection and .

Shade the region between .