Question

evaluate (sin 42/cos48)^2+(cos48/son42)^2

Answer 1

Heya,

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$\frac{ \sin(42) }{ \cos(48) } + \frac{ \cos(48) }{ \sin(42) } = \frac{ \sin(90 - 48) }{ \cos(48) } + \frac{ \cos(90 - 42) }{ \sin(42) } \\ = \frac{ \cos(48) }{ \cos(48) } + \frac{ \sin(42) }{ \sin(42) } \\ = 1 + 1 \\ = 2$
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