Question

prove this fast......​

Answer 1

Step-by-step explanation:

the concept used id trigonometry and quadratic equations

Answer 2

Answer:

Step-by-step explanation:

1=$sin^{2}$Ф=3sinФcosФ

divide by cos²Ф then

1+sin²Ф/cos²Ф=3tanФ

⇒1/cos²Ф+sin²Ф/cos²Ф=3tanФ

sec²Ф+tan²Ф=3tanФ

1+tan²Ф+tan²Ф=3tanФ

2tan²Ф-3tanФ+1=0

tan²Ф-3tanФ+1=0

tanФ=3±√(-3)²-4*2/4

tanФ=3±1/4

tanФ=1 or 1/2