Question

if cos 9 a equal sin a find the value of tan 5 a​

Answer 1

Step-by-step explanation:

cos=9a

tan=5a

....................given

To find:sina

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we know that

$\tan(0) = \frac{ \sin( 0) }{ \cos(0) }$

therefore,

$\tan( \alpha ) = \frac{ \sin( \alpha ) }{ \cos( \alpha ) }$

$5 \alpha = \frac{ \sin( \alpha ) }{9 \alpha }$

$5 \alpha \times 9 \alpha = \sin( \alpha )$

$therefore$

sin a =45a