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°

Find the value of cot 45°.

How much possible solution.

Y= 6x+2 and sin 90°

Plote a graph 

7x+4y=1

4x+5y=2

Find the solution of the equation

2x+3y=6

5x+3y=8