If alpha and beta are the angles in the first quadrant tan alpha = 1/7 and sin beta =1/ root 10 then usind the formula sin (A +B) = sin A. CosB + sina. CosB find the value of alpha + 2beta

Step-by-step explanation:

Using Pythagorean Identities:

The sum Identity is:

I will just follow what the question asks.

Now we can perform the sum identity:

But we are not done yet! You want

and not

You actually want the

8121 because

130,000 divided by 16 is 8121

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.