Write about article 243.

Who was first govrner of bangal?

Cos A+ cos B=??

SinA+sinB=??

tan A+tan B= ??

tan (45+A)=??

Find the value of cos 30°.

Find the value of sin120°.

Find the value sin135°.

Find the value of sin30°+ cos 30°.

Find the vaule.of tan 30°+tan 45°