Question

Resolva
Cos x = -12/13
Ache o senx e cotgx

Answer 1

cos²x + sen²x = 1

(-12/13)² + sen²x = 1

144/169 + sen²x = 1

sen²x = 1 - 144/169

sen²x = 169/169 - 144/169

sen²x = 25/169

senx = √25/169

senx = 5/13

cotgx = cosx/senx

cotgx = -12/13/5/13

cotgx = -12/13 * 13/5

cotgx = -156/65

Espero ter ajudado ;)