Question

Sabendo que cos a = -5/13, com a E || Q, calcule as demais razões trigonométricas de a

Answer 1

Resposta:

sena=12/13

tga=-12/5

Explicação passo-a-passo:

cos²a+sen²a=1

(-5/13)²+sen²a=1

25/169+sen²a=1

sen²a=1-25/169

sen²a=(169-25)/169

sen²a=(144)/169

sena=12/13

tga=sena/cosa

tga=12/13:-5/13

tga=-12/5