1.

(0 is a positive acute angle)W.B.M. 1962(a) Of the two acute angles the sine of one is equal to the cosine of the| |aifA+other. Find the sum of the two angles.

Answer»

The sine of an angle and the cosine of its complement are equal. 15º and 75º are complementary.sin(75º) = cos(15º) = 0.97cos(75º) = sin(15º) = 0.26



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