नमक ;ज्ञात कीजिए :sin 42° cos 48° + sin 48 – InterviewSolution

1.	नमक ;ज्ञात कीजिए :sin 42° cos 48° + sin 48° cos 42°
Answer» cos 48 = sin(90-48) = sin 42. sin 48 = cos (90-48) = cos 42Therefore, sin42 cos 48 + sin 48 cos 42 = (sin42)^2 + (cos42)^2= 1.

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