Tolong dijawab cara penyelesaiannya, terima kasih!

4). tan = 2/akardr5
sec= 1/cos
sisi miring = akar (2^2 + (akar5)^2)
= akar (4+ 5)
= akar 9
= 3
sec = (akar 5)/3
kuadran 3 ==> sec = - (akar 5)/3