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ANEK [815]
3 years ago
6

Suppose sin(B)=.75. Calculate cos(A)

Mathematics
2 answers:
Montano1993 [528]3 years ago
6 0
SinB = 0.75

Recall:  Sin²B + Cos²B = 1

0.75² + Cos²B = 1

0.5625 + Cos²B = 1

Cos²B = 1 - 0.5625
 
Cos²B = 0.4375

CosB = + or -√0.4375

Cos B ≈ + or -0.6614 




SOVA2 [1]3 years ago
4 0
We use the formula (sinB)^2 + (cosB<span>)^2 = 1;
But, sinB = 3/4;
Then, (cosB)^2 = 1 - 9/16;
(cosB)^2 = 7/16;
cosB = + or - </span>√7 / 4;
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Answer:

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Answer:

  see attached

Step-by-step explanation:

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Answer:

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