Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is sin(90° − θ)?
💡 Hint: Think about the relationship between sine and cosine.
Question 2
Easy
What happens to cos when the angle is negative?
💡 Hint: Is cosine even or odd?
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the value of sin(90° - θ)?
- cos(θ)
- sin(θ)
- tan(θ)
💡 Hint: Consider how sine and cosine relate.
Question 2
True or False: cos(-θ) = -cos(θ).
- True
- False
💡 Hint: Is cosine odd or even?
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Prove that sin(90° - θ) = cos(θ) by using the definitions of the sine and cosine functions.
💡 Hint: Draw a right triangle and label the sides with respect to angle θ.
Question 2
If sin(30°) = 1/2, find cos(60°) and verify via co-function identity.
💡 Hint: Consider how complementary angles relate.
Challenge and get performance evaluation