Question

If sin x=3/4 then cos x = ? ​

Answer 1

Answer:

cos x = √7/4

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Answer 2

Answer:

squaring both sides

sin ² x = 9 / 16

Step-by-step explanation:

1 - cos ² x = 9 / 16

- cos ² x = 9/ 16 - 1

- cos ² x = -16 + 9

16

- cos ² x = - 7 / 16

cos x = √7 / 4