Given tan() = 4/3 and sin() -4/5, find cos()

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asked Oct 25, 2023 36.8k views

1 Answer

Ray Fischer · Answer 1 · 2023-10-28T13:36:27+0000

Answer:

Make a triangle with an opposite side of 4 and adjacent side of 3 (hypotenuse is 5). You can now work out all trig functions for that angle. including sin(x)

Use the double angle formula to find sin(2x)

Explanation:

Given tan() = 4/3 and sin() -4/5, find cos()

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