If the sin 60=√3/2, then which statement is true?
2 answers:
Answer:
Option A
Step-by-step explanation:
Sin 60 = 
is the statement given in this question.
We know from the trigonometric identities.
Sin x = cos ( 90-x )
In other words Sin and Cos are complementary.
Therefore, Sin 60 = Cos ( 90 - 30 )
= Cos (30)
=
Therefore, option A is the answer
Cos30 = sin(90 - 60) = √3/2, because cos and sin are complements
cos120 = cos(180 - 60) = -cos60 = -1/2
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