# Trigonometry

Show that 2 tan20° + 4 tan40° + 8 tan 80° = 9(cot10° - tan10°). Thank you :)

WYZANT.COM
CREATE FREE ACCOUNT
Sign In

Access thousands of free resources from expert tutors

Comment on posts and interact with the authors

Ask questions and get free answers from tutors

View videos, take interactive quizzes, and more!

Show that 2 tan20° + 4 tan40° + 8 tan 80° = 9(cot10° - tan10°). Thank you :)

(i) Given that cos A =3/5 and cos(A+B) =-5/13, where A and B are acute, evaluate sin B. (ii) Another acute angle C is such that sin C=12/13. Find sin(A+B+C). (iii)...

Given that cotθ=k and that θ is acute, express tan3θ in terms of k. Ans: (3k2-1)/(k)(k2-3) Thank you :)

Thanks for the help! If you could please show all your work? Thanks again!

This is for my trig class. Thanks for the help!

This is for my trig class, thanks for the help! If you could, could you please show all your work? Thanks again!

This is for my trig class, thanks for the help!

This is for my trig class, thanks for the help!

This is for my trig class. Thanks for the help!

This is for my trig class. Thanks for the help!

This is for my trig class. Thanks for the help!

A. sin22.5 degrees and B. tanpi/12 degrees

This is for my trig class. Thanks for the help!

This is for my trig class, thanks for the help!

This is for my trig class. Thanks for the help!

This is for my trig class. Thanks for the help!

This is for my trig class, thanks for the help! If you could, could you please show all your work? Thanks again!

This is for my trig class, thanks for the help! If you could, could you please show all your work? Thanks again!

- Trigonometry 164
- Math Help 595
- Math 1334
- Trigonometric Functions 24
- Trigonometric Identities 41
- Cosine 16
- Sine 15
- Tangent 11
- Solutions 10
- Simplify 118
- Verify 8
- Trigonometry Identities 23
- Formulas 8
- Trigonometric Formulas 6
- Trig Functions 4
- Quadratic Formula 30
- Sum 7
- Trig Identities 6
- Sin 4