find the value of the expression if sin beta= 0.45, find cos(pi/2-beta)

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24-11-2016
Mathematics

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find the value of the expression if sin beta= 0.45, find cos(pi/2-beta)

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HomertheGenius HomertheGenius · Answer 1 · 2016-11-25T22:12:53+01:00

HomertheGenius HomertheGenius

25-11-2016

If sin β = 0.45, we have to find cos ( π/2 - β ).
We know that: sin x = cos ( 90° - x ), or sin x = cos ( π/2 - x ).
For example: sin 60° = cos 30°.
cos ( π/2 - β ) = sin β = 0.45
Answer: 0.45

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