Question

find the value of tan 2A, if cos3A =sin45°

Answer 1

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Answer 2

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cos 3A = sin 45°

➡cos 3A=1/√2

➡cos 45°=1/√2

➡3A=45°

➡A=15°...............(1)

tan 2A

=tan30°

=1/√3

.....................