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Mathematics 18 Online
zarkam21:

Help please

zarkam21:

1 attachment
Vocaloid:

for a) you are given the opposite side and you want to find the hypotenuse. which trig ratio should we use?

zarkam21:

sin?

Vocaloid:

good so sin(theta) = opposite/hypotenuse solve for hypotenuse

zarkam21:

cos solves for adjacent

zarkam21:

okay

zarkam21:

wouldnt it be the inverse

zarkam21:

because there is no ypotenuse

Vocaloid:

what do you think the hypotenuse is equal to? can you try writing an expression for it?

zarkam21:

i thought it would be sin^-1(38)

Vocaloid:

we are not solving for theta so there is no reason to take the inverse of a trig function

zarkam21:

oh we could do hypotenuse = sin(theta) * opposite?

Vocaloid:

just substitute the hypotenuse, opposite, and angle into sin(theta) = opposite/hypotenuse then solve for hypotenuse

Vocaloid:

check your math again

zarkam21:

32.5

Vocaloid:

good that's a

Vocaloid:

then you could use another trig function to solve for b

zarkam21:

cos

Vocaloid:

sure

zarkam21:

25.6

Vocaloid:

good, that's it

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