Question

sin17° + cos17°
I (Prove that):
cos17° - sin170 = tan 620​

Answer 1

Step-by-step explanation:

Let x = ( cos17 + sin17 ) / ( cos17 − sin17 )

  Dividing Numerator & Denominator by cos 17

         = ( 1 + tan17 ) / ( 1 − tan17 )

We know tan 45 = 1,

         = ( tan45 + tan17 ) / ( 1 − tan45.tan17 )

tan( A + B ) = tan A + tan B /  1 - tan A.tan B  

         

         = tan62

Thus, ( cos 17 +sin 17 )/(cos 17-sin17) = tan 62

Answer 2

Answer:

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