Digital SAT Math Practice Question #1641
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
sin(A) = cos(B) -> A + B = 90°. (3x - 10) + (2x + 25) = 90 -> 5x + 15 = 90 -> x = 15.
By the cofunction identity, \(\sin(A) = \cos(B)\) when \(A + B = 90^\circ\). Thus \((3x - 10^\circ) + (2x + 25^\circ) = 90^\circ \implies 5x + 15^\circ = 90^\circ \implies 5x = 75^\circ \implies x = 15\)....
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