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If sin A= 0.23 and 90* ≤ A ≤ 180* , determine cos A to 2 decimal places.?

If sin A= 0.23 and 90* ≤ A ≤ 180* , determine cos A to 2 decimal places.

Thankyou

2007-06-14 12:56:26 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

2 answers

A = 166.7°
A is in 2nd quadrant.
cos A = - 0.97

2007-06-14 20:27:29 · answer #1 · answered by Como 7 · 0⤊ 0⤋

.97

2007-06-14 20:31:12 · answer #2 · answered by Laura P 3 · 0⤊ 0⤋

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