sin ( x ) = + OR / [ tan (x) /sqrt ( 1 + tan ^2 (x)]
sin ( x ) = + OR - [ 4/ sqrt ( 1 + 4 ^2 ) ]
sin ( x ) = + OR - m4/ sqrt ( 1 + 16 )
sin ( x ) = + OR - 4/ sqrt ( 17)
cos ( x ) = + OR / 1 /sqrt ( 1 + tan ^2 (x)
cos( x ) = + OR - 1 / sqrt ( 17)
If you want all trigonometric identities in google type:
wikipedia List of trigonometric identities
find cosx and sinx if tanx = 4
2 answers
cos ( x ) = + OR - 1 /sqrt ( 1 + tan ^2 (x) )
1 answer