a)([email protected][email protected])/[email protected]=(2*[email protected]*[email protected])/(4*[email protected]*[email protected])=
[email protected]/(2*[email protected])
b)([email protected][email protected])/[email protected]=(2*[email protected]*[email protected])/(2*[email protected]*[email protected])=
[email protected]/[email protected]
a)([email protected][email protected])/[email protected]=(2*[email protected]*[email protected])/(4*[email protected]*[email protected])=
[email protected]/(2*[email protected])
b)([email protected][email protected])/[email protected]=(2*[email protected]*[email protected])/(2*[email protected]*[email protected])=
[email protected]/[email protected]
2. Cos/cos2