3 years ago

The angle t is acute and sin t = 6/7 is given use a Pythagorean identity to find cos t

Mathematics

1 answer:

Dennis_Churaev [7]3 years ago

7 0

Answer:

sqrt(1 - 36/49) = +root(13)/7

Step-by-step explanation:

sin^2t + cos^2t is identical to 1 for all t.

(6/7)^2 + cos^2t = 1

1 - 36/49 = cos^2t

hence plus/miuns sqrt(1 - 36/49) = cos(t)

since t is acute, the answer must be positive.

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