Answer:
m∠L + m∠M = 90°
sin(L) = 0.66913
sin(M) = 0.74314
Explanation:
The sum of the two angles is ...
m∠L + m∠M = 42° +48° = 90°
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A calculator can show you the sines of these angles.
sin(42°) ≈ 0.66913
sin(48°) ≈ 0.74314
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The two acute angles of a right triangle always have a sum of 90°.