What is the value of cos 90 nd tan 90 ??

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Solution

Dear student,

$\cos (90) = 0 \sin (90) = 1 \tan (90) = \frac{\sin (90)}{\cos (90)} = \frac{1}{0} = i n f i n i t y S o \tan (90) i s u n d e f i n e d$

Here angles are expressed in degrees

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