Answer:
The sentence is True
Step-by-step explanation:
In Geometry, there is a theorem that relation the sine angle and the cosine angle. The theorem says: The sine of any acute angle is equal to the cosine of its complement.
So, let β represent an acute angle
sin (β)=cos(90-β)
Given β=30, let it replace in the formule:
sin (30)=cos(90-30)
sin (30)=cos(60)
Done.
