Question

Sin160= 2(sin80cos80)

Answer 1

Answer:

what we have to do

Step-by-step explanation:

we can write sin 160 =sin 2(80)

which is in the form of sin 2 theta

sin 2 theta =2 sin theta cos theta

so we can write sin2(80)

2sin 80 cos80

HENCE PROVED

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