Question

sin(A+B)=sin A cos B + cos A sin B​

Answer 1

Answer:

it's formula.

Step-by-step explanation:

you can check by putting any values of a and b

Answer 2

sin(A+B)=sinAcosB+cosAsinB and

cos(A−B)=cosAcosB+sinAsinB

(i) To find : sin75

∘

Put A=30

∘

and B=45

∘

, then

sin(30

o

+45

o

)=sin75

∘

=sin30

∘

cos45

∘

+cos30

∘

sin45

∘

=(1/2)×(1/

2

)+(

3

/2)×(1/

2

)

=(1/2

2

)+(

3

/2

2

)

sin(75

o

)=

2

2

(1+

3

)

Step-by-step explanation:

please mark brainlist