Double Angle Trig Identities

• Mathematics
• Higher Education (degree)

Pythagorean Trig Identites

Unit Circle Recap

04:37

Which side of the right angle triangle is associated with cosθ in the Unit Circle?

1. Hypotenuse
2. Adjacent
3. Opposite
4. All 3 sides

07:07

Are you happy with how the Pythagorean trig identity links to Pythagoras' Theorem?

1. Yes
2. No

07:18

How happy are you with this topic so far?

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Double Angle Trig Identities

02:27

Which of the following double angle identities is equal to 2sin(θ)

1. 2sinθcosθ
2. 2cosθsinθ
3. tan2θ
4. 2cos(θ)tan(θ)

03:49

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