* I know you have to set it up like a proportion i just dont know how to solve.
Answer:
The value of cosA = (√3)/2 and tanA = 1/√3 or (√3)/3.
Step-by-step explanation:
Firstly,youhavetofindthevalueofadjacentusingPythogoras'Theorem,a²=b²+c²:
Let a = 2, b = 1
2² = 1² + c²
c² = 2² - 1²
= 4 - 1
= 3
c = √3
NowwehavefoundtheadjacentsowecanfindcosAandtanAusingTrigonometricfunction,cosθ=adj./hypo.andtanθ=oppo./adj.:
adj. = √3
oppo. = 1
hypo. 2
cosA = (√3)/2
tanA = 1/√3 OR (√3)/3