Question

If A = 60° and B = 30°, prove that:
(i) sin (A + B) = sin A cos B + cos A sin B​

Answer 1

Step-by-step explanation:

sin( A+ B) = sin A. cos B+cos A. sin B

sin(60°+30°)=sin 60°.cos 30°+cos 60°+ sin 30°

sin 90°= √3/2.√3/2+1/2.1/2

1=3/4+1/4

1=4/4

1=1

Hence,proved

Answer 2

Answer:

ex 20 B 10 .. ... ek bat batao 20 ex mai sarai sum karnai hai aurv 1, 2,3----- baki sari ex mai sarai sum karnai hai kya??