Постройте угол: 1) косинус которого равен 6/7 2) тангенс которого равен 3/5

1.I am 15 years old now . 2.I was 14 years old last year. 3.Yes, I do . I usually have a party on my birthday. 4.My best friends and close relatives usually come to my birthday party . 5.My parents and friends usually give me presents.