Search 75,863 tutors

# trig question

Consider the equation cos(4.38t)=0.1 Find the smallest positive solution in radians and round your answer to 4 decimal places

# Find the exact value of each expression

Find the exact value of each expression:\\ (a) sin-1(√(3)/2) = (b) cos-1(-1) =

# sinA=4/5 and obtuse, cosB=4/5 and in quadrant I what is cosB

Use the sum of difference formula to find the exact value

# (4sinxcosx-2sinxsecx)/2tanx

Help simplify the expression and show the steps too!

# in triangle ABC a=3 b=5 and cos(C)= 13 what is the value of c

in triangle ABC a=3 b=5 and cos(C)= 13 what is the value of c

# Trigonometry

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

# Trigonometry

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

# Trigonometry

(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)...

# Find the value of ALL the other five trigonometric functions, given tanx= 4/11, secx<0.

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

# Use the quadratic formula to find all solutions in the interval [0,2pi): tan^2x-6tanx+4=0

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

# Find all solutions in the interval [0,2pi): sin2x=cosx

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

# Find all solutions in the interval [0,2pi): tan^2x+(sqrt3 - 1)tanx-sqrt3 = 0

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

# Write sin(sin^-1x-cos^-1x as an algrebraic expression in x.

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

# Find the value of the other five trigonometric functions, given tanx= 4/11, secx<0.

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

# Use the quadratic formula to find all solutions in the interval [0,2pi): tan^2x-6tanx+4=0

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

# Verify: sin9x+sin5x/cos9x-cos5x=cot2x

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

# Verify: cosusinv=1/2[sin(u+v)-sin(u-v)

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

# Use the double angle formulas to determine: A. cos120degrees and B. tan300degrees

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