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01-06-2021
Mathematics

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Which step is incorrect? Look at picture

Which step is incorrect Look at picture class=

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01-06-2021

Answer: step 4 is incorrect

Step-by-step explanation:

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02-06-2021

Answer:

step 4 is incorrect.

there must be;

cos(π/2-x)cos(y)-sin(π/2-x)siny

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