Practice Co-function And Negative Angle Identities (4) - Trigonometric Identities and Graphs

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is sin(90° − θ)?
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Think about the relationship between sine and cosine.
Question 2.
What happens to cos when the angle is negative?
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Is cosine even or odd?
3Question 3.
What is the value of sin(90° - θ)?
- cos(θ)
- sin(θ)
- tan(θ)
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Consider how sine and cosine relate.
4Question 4.
True or False: cos(-θ) = -cos(θ).
- True
- False
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Is cosine odd or even?
Question 5.
Prove that sin(90° - θ) = cos(θ) by using the definitions of the sine and cosine functions.
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Draw a right triangle and label the sides with respect to angle θ.
Question 6.
If sin(30°) = 1/2, find cos(60°) and verify via co-function identity.
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Consider how complementary angles relate.

4 more questions in this section. Enroll free to practise them all.