Cos 38 cos 52 - sin 38 sin 52
Answers
Answered by
2
Answer:
Cosx cosy - sinx Siny = cos(x+y)
Cos 38 cos 52 - sin 38 sin 52 = cos ( 38 + 52 ) = cos 90 = 0
Answered by
8
Step-by-step explanation:
cos(90-52).cos(90-38)-sin38.sin52
sin52.sin38-sin38.sin52
=0
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