Proof/Identity Check in Degrees

Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Thames
T
Thames
Community Contributor
Quizzes Created: 6941 | Total Attempts: 9,517,194
| Questions: 20
Please wait...
Question 1 / 20
0 %
0/100
Score 0/100
1) Which identity is correct for cos(105°)?
Submit
Please wait...
About This Quiz
Proof/Identity Check In Degrees - Quiz

Can you spot which identity works and which ones don’t? In this quiz, you’ll match trigonometric statements to the correct sum or difference formula, checking your understanding of sine, cosine, and tangent identities. Some will be in degrees, others in radians, and all will challenge you to think carefully... see moreabout signs and formulas. We bring you this quiz to strengthen your proof and recognition skills. see less

2)
We’ll put your name on your report, certificate, and leaderboard.
2) Which identity is correct for sin(15°)?
Submit
3) Which identity is correct for cos(165°)?
Submit
4) Which identity is correct for tan(105°)?
Submit
5) Which identity is correct for sin(165°)?
Submit
6) Which identity is correct for cos(15°)?
Submit
7) Which identity is correct for tan(165°)?
Submit
8) Which identity is correct for sin(11π/12)?
Submit
9) Which identity is correct for cos(11π/12)?
Submit
10) Which identity is correct for tan(11π/12)?
Submit
11) Which identity is correct for sin(5π/12)?
Submit
12) Which identity is correct for cos(5π/12)?
Submit
13) Which identity is correct for tan(5π/12)?
Submit
14) Which identity is correct for cos(-15°)?
Submit
15) Which identity is correct for sin(75°)?
Submit
16) Which identity is correct for cos(15°)?
Submit
17) Which identity is correct for tan(15°)?
Submit
18) Which identity is correct for cos(75°)?
Submit
19) Which identity is correct for sin(105°)?
Submit
20) Which identity is correct for tan(75°)?
Submit
View My Results

Quiz Review Timeline (Updated): Oct 12, 2025 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Oct 12, 2025
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 30, 2025
    Quiz Created by
    Thames
Cancel
  • All
    All (20)
  • Unanswered
    Unanswered ()
  • Answered
    Answered ()
Which identity is correct for cos(105°)?
Which identity is correct for sin(15°)?
Which identity is correct for cos(165°)?
Which identity is correct for tan(105°)?
Which identity is correct for sin(165°)?
Which identity is correct for cos(15°)?
Which identity is correct for tan(165°)?
Which identity is correct for sin(11π/12)?
Which identity is correct for cos(11π/12)?
Which identity is correct for tan(11π/12)?
Which identity is correct for sin(5π/12)?
Which identity is correct for cos(5π/12)?
Which identity is correct for tan(5π/12)?
Which identity is correct for cos(-15°)?
Which identity is correct for sin(75°)?
Which identity is correct for cos(15°)?
Which identity is correct for tan(15°)?
Which identity is correct for cos(75°)?
Which identity is correct for sin(105°)?
Which identity is correct for tan(75°)?
Alert!

Back to Top Back to top
Advertisement