3 years ago

In a right triangle ABC, tan(a)= 20/21.find sin(a) and cos(a)

1 answer:

4 0

Sin(a)=opposite/hypotenuse
∴hypotenuse=√20²+21²
=√400+441
=√841
=29
∴sin(a)=20/29
=0.6897

cos(a)=adjascent/hypotenuse
=21/29
=0.7241

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