Trigonometric and Exponential Graphs

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Question 9
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Here is a sketch of the curve y=cos⁡x∘y = \cos x^\circy=cosx∘ for 0≤x≤3600 \leq x \leq 3600≤x≤360

A graph of the cosine function y = cos x degrees for 0 ≤ x ≤ 360.

Use the graph to find estimates of the solutions, in the interval 0≤x≤3600 \leq x \leq 3600≤x≤360, of the equation:

i.

cos⁡(x)=−0.85\cos(x) = -0.85cos(x)=−0.85

[2]
ii.

4cos⁡(x)=14 \cos(x) = 14cos(x)=1

[2]

Trigonometric and Exponential Graphs Questions

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