Question

anyone do question 4aii) part please help to do this question I will mark you as brainlist​

Answer 1

Answer:

i think b) ii part

Step-by-step explanation:

a part i think that is ii

Answer 2

Answer: Sin 2x formula is 2sinxcosx.

Step-by-step explanation:

Statement:

sin(2x)=2sin(x)cos(x)

Proof: The Angle Addition Formula for sine can be used:

sin(2x)=sin(x+x)=sin(x)cos(x)+cos(x)sin(x)=2sin(x)cos(x)

That's all it takes. It's a simple proof, really.