inverse trig question (1 Viewer)

Abhiram Yanamandra

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Please help me with this question.
find the exact value of sin(cos^-1(2/3)+tan^-1(-3/4))
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Drongoski

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To better understand: draw 2 associated right-angled triangles:
1) angle theta, with sides 2, root 5, 3
2) angle phi, with sides 3,4,5

 
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