First is yes
Second is no
Third is no
Fourth is no
A is correct. Hope my answer helped u :)
Answer:
187.5
Step-by-step explanation:
Take a look at the photo attached.
Answer:
sin²x
Step-by-step explanation:
we have
(1 − cos x)(1 + cos x)=1-cos²x
Remember that
sin²x+cos²x=1 ------> i-cos²x=sin²x
therefore
(1 − cos x)(1 + cos x)=sin²x
