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Trigonometric Functions

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Question 90
a.

Show that the equation sec⁡2x+3tan⁡2x=−4sec⁡x\sec^2 x+3\tan^2 x=-4\sec xsec2x+3tan2x=−4secx can be written in the form asec⁡2x+bsec⁡x+c=0a \sec^2 x + b \sec x + c = 0asec2x+bsecx+c=0

[2]
b.

Hence, given x x\,x is obtuse find the exact value of tan⁡x\tan xtanx.

[5]
Markscheme

Trigonometric Functions Questions

  1. A Level
  2. /Maths
  3. /Trigonometric Functions

274 exam-style questions on Edexcel A Level Maths Trigonometric Functions, covering 6.1 Secant, Cosecant and Cotangent, 6.2 Graphs of Sec x, Cosec x and Cot x, 6.3 Using Sec x, Cosec x and Cot x, 6.4 Trigonometric Identities, and 6.5 Inverse Trigonometric Functions. Each one has a worked solution and a mark scheme showing where the marks go.

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