Mathematics: Hi can someone me? if sin2a=cos 3a find the value of a. can you explain in full detail how you arrived at your answer? also find the exact value of (sec30)^2. will i need to use a calculator in order to solve this prob?

Hi can someone me? if sin2a=cos 3a find the value

Ответ:

Laylahlettiere

12.07.2020

Mathematics

Sin (x) = Cos (90 - x)
sin(2A) = cos (90 - 2A)
=cos (3A)
90 - 2A = 3A
5A=90
A=18

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Ответ:

reaperqueen21

20.09.2022

Mathematics

It is the answer d. d looks correct. it says half and half of 2,000 is 1,000 so wouldn't d be correct

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Hi can someone me? if sin2a=cos 3a find the value of a. can you explain in full detail how you arrived at your answer? also find the exact value of (sec30)^2. will i need to use a calculator in order to solve this prob?

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