trig question

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In right triangle JKB, angles J and B are complementary angles. If cos J = 9/12, what is the value of sin B?

Guest Feb 25, 2021

Guest · Answer 1 · 2021-02-25T05:10:11

Since sine and cosine are opposite trig functions, sin(B) is also 9/12 or 3/4

MaxWong · Answer 2 · 2021-02-25T05:24:05

$\angle J$ and $\angle B$ are complementary => $\angle J + \angle B = 90^\circ$ => $\angle B = 90^\circ - \angle J$

$\sin B = \sin(90^\circ - J) = \cos J = \dfrac 9 {12} =\dfrac34$

Melody · Answer 3 · 2021-02-25T09:52:41

Asker can you please tell me what complimentary means? Do you know?

If you don'r know then look it up.

Either way please answer my question.