2sinA=1 calculate the value of tanA​

±1/√3

Step-by-step explanation:

2sinA = 1

sinA = 0.5

cosA = √(1² - 0.5²) = ±√0.75

tanA = sinA/cosA = 0.5/ ±√0.75 = ±1/√3

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.