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Sagot :
Sine and cosine — a.k.a., sin(θ) and cos(θ) — are functions revealing the shape of a right triangle. Looking out from a vertex with angle θ, sin(θ) is the ratio of the opposite side to the hypotenuse , while cos(θ) is the ratio of the adjacent side to the hypotenuse .
i don't get it but i hope this helps
Answer:
θ ≈ 0.785398 -1.089533i radians
Step-by-step explanation:
The sum of the sine and cosine can never exceed √2 for real-valued angles. The angle that gives this sum is the complex angle ...
θ ≈ 0.785398 -1.089533i radians
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Additional comment
sin(θ) +cos(θ) = √2·cos(θ-π/4)
We want the value of this to be 2.34, so ...
2.34 = √2·cos(θ -π/4)
cos(θ -π/4) = 2.34/√2
θ -π/4 = arccos(1.17√2)
θ = π/4 +arccos(1.17√2)
A suitable calculator can provide the complex value of the arccos of a number greater than 1.
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