Answer :
The value of Sin(a) suppose that Cos B = 0.68 in which case, a + B = 90° is; 0.68.
Trigonometry
First, when we have two angles, whose sum equals, 90°.
In essence, Since the algebraic sum of angles A and B is 90°;
- A + B = 90.
- B = 90 -A.
By trigonometric identity;
- Sin A = Cos (90 - A)
Where; (90 - A) = B.
Therefore; Sin A = Cos B = 0.68.
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