209k views
5 votes
Hello I need help with my math I need help with part B question two

Hello I need help with my math I need help with part B question two-example-1
User Maslick
by
8.2k points

1 Answer

7 votes

Explanation:

well, the same principle as for a).

just instead of sine we need to use cosine here.

remember the trigonometric triangle : the up/down leg is sine (multiplied by the radius of the surrounding circle, which is the Hypotenuse of the triangle). and the left/right leg is cosine (multiplied by the Hypotenuse).

so,

12 = 15×cos(x)

cos(x) = 12/15 = 4/5 = 0.8

x = 36.86989765...°

of course, if you prefer, you could use Pythagoras

c² = a² + b²

to get the missing 3rd side, and then use that with sine the same way as for a).

User Bython
by
8.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.