Using Trigonometric Identities In Exercises 81 and 82, use trigonometric identit

nicekikah

nicekikah

Answered question

2021-10-29

Using Trigonometric Identities In Exercises 81 and 82, use trigonometric identities to transform one side of the equation into the other.
cotθ+tanθcotθ=sec2θ

Answer & Explanation

hajavaF

hajavaF

Skilled2021-10-30Added 90 answers

To determine
To Transform: one side of the equation into the other
Explanation of Solution
Given information: cotθ+tanθcotθ=sec2θ
Concept used:
Quotient Identities:
tanθ=sinθcosθ
cotθ=cosθsinθ
Pythagorean Identities:
1+tan2θ=sec2θ
Calculation:
Work on the left side’s expression to convert it to sec2θ. Start by dividing
cosθ+tanθcotθ=1+tanθcotθ
cosθ+tanθcotθ=1+sinθcosθcosθsinθ
cosθ+tanθcotθ=1+sin2θcos2θ
cosθ+tanθcotθ=1+tan2θ
Use Pythagorean Identities
1+tan2θ=sec2θ
cotθ+tanθcotθ=sec2θ

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