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blackpenredpen

Sharing the fun of solving math problems!

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2420 videos

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The last virtual office hour! (Chegg Trig & Precalculus)

6,674 views
9 months ago

A quick guide to finding the range of a fuction! Chegg Trig & Precalculus office hour

6,014 views
10 months ago

Are they the same function? Be careful with the domain! Chegg Trig/Precalculus office hour

7,481 views
10 months ago

How to solve logarithmic equations! Chegg Trig & Precalculus Office Hours with blackpenredpen

8,006 views
10 months ago

Let's solve exponential equations! Chegg Trig & Precalculus Office Hour!

8,666 views
11 months ago

How to solve HARD polynomial equations! Chegg Trig & Precalculus Office Hours

10,257 views
11 months ago

sin(x)+cos(x)=? Vertical asymptote vs hole? Inverse of (ax+b)/(cx+d)=? Chegg Precalculus office hour

8,524 views
11 months ago

Be careful when you use the law of sines! What's sin(18 deg)? & more! Chegg Precalculus Office Hours

8,295 views
11 months ago

How to solve a tricky domain problem and more? Chegg Trig & Precalculus Office Hours

7,577 views
11 months ago

Ask me Trig! How do you solve tricky trigonometric identity problems? (Chegg Virtual Office Hours)

9,781 views
1 year ago

Trig & Precalculus Office Hours w/ @blackpenredpen - We're Live, Ask Away!

8,128 views
1 year ago

Hello from UC Berkeley (Berkeley Math Tournament Day)

9,083 views
1 year ago

Live: This is what the 2023 Berkeley Math Tournament calculus test looks like!

15,725 views
1 year ago

Live: Unboxing a University of Oxford Math Admission Test!

76,444 views
1 year ago

Hello, dear members! 3/10/22

3 years ago

Members only

How I Make My Calculus Exams Harder!

39,421 views
4 years ago

Solving my Calc 2 Exam#3 (Series & Power Series)

24,140 views
4 years ago

Does it converge? (part 3: alternating series, ratio test, & root test)

13,580 views
4 years ago

Does the series converge (part 2: p-series, integral test, comparison tests)

18,315 views
4 years ago

Does the series converge? (Part 1: test for divergence, telescoping, geometric, p-series)

23,455 views
4 years ago

How To Solve Related Rates & Optimizations (calculus livestream)

62,836 views
4 years ago

Solving 8 Equations w/ Lambert W function

74,610 views
4 years ago

"Partial Fractions Or Not" Integral Quiz, Calculus 2

35,040 views
4 years ago

An Afternoon With Professor Po Shen Loh

37,075 views
4 years ago

Trig/Trig Sub Integrals But Harder (Calculus 2 challenge)

45,495 views
5 years ago

Integration By Parts But Harder (calculus 2 challenge)

58,737 views
5 years ago

Solving My Calc 2 Exam#3 (Sequence, Infinite Series & Power Series)

77,788 views
5 years ago

What series convergence test do I use?

400,738 views
5 years ago

Solving My Calc 2 Exam#2 (improper integrals, approximating integrals, & separable diff eq)

78,524 views
5 years ago

Solving My Calc 2 Exam (what integration technique do we use?)

59,691 views
5 years ago

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