Question

6. Given that: SinA = a/b,
then cosA = ?​

Answer 1

Step-by-step explanation:

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Answer 2

SinA = a/b means P= a , H=b

H^2=P^2+B^2

b^2 = a^2 +B^2

b^2-a^2 = B^2

√b^2-a^2 = B

b-a = B

cosA = B/H

= b-a/b

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