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The cos(m) In the right triangle lmn is 19/20.
Complementary angles are formed when the total of two angles equals 90 degrees. 30 degrees and 60 degrees, for example, are complementary angles.
We have L + M = 90 because the angles L and M are complimentary.
Assuming that,
sin L = sin (90 - L) = sin M
sin (L) = 19/20.
As we know from our rule, the sine of angle L is equal to the cosine of L's complement, which is M.
This implies that the cosine of M is 19/20.
As a result, cos(M) equals 19/20.
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