622 Answered Questions for the topic Trig

08/25/14

Trigonometry - Bearings
2 hikers set out from the same campsite. One walks 7km in the direction of 043°T and the other walks 10km in the direction 133°T. What is the bearing of the first hiker from the second?   I can... more
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08/07/14

Law of cosines
For the kite shown in the figure, use the Law of Cosines to find the lengths of the two dowels required for the diagonal supports, where a = 70 cm, b = 150 cm, α = 55°, and β = 42.24°.
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07/26/14

What sine function represents an amplitude of 1, a period of 2p, a horizontal shift of p, and a vertical shift of -4?
trig need help with me. please!! 
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Trig Math Help

07/20/14

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
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05/20/14

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

05/18/14

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 
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05/12/14

(4sinxcosx-2sinxsecx)/2tanx
Help simplify the expression and show the steps too!
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Trig

05/01/14

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
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02/11/14

Trigonometry
Show that 2 tan20° + 4 tan40° + 8 tan 80° = 9(cot10° - tan10°).     Thank you :)
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02/11/14

Trigonometry
Given that cotθ=k and that θ is acute, express tan3θ in terms of k.   Ans: (3k2-1)/(k)(k2-3)         Thank you :)
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02/11/14

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) Determine whether A, B... more
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01/07/14

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!  
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01/06/14

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!
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01/06/14

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!
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01/06/14

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!
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01/06/14

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!
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01/06/14

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!
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01/05/14

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!
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01/05/14

Verify: sin9x+sin5x/cos9x-cos5x=cot2x
This is for my trig class, thanks for the help!
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01/05/14

Verify tan^4x+2tan^2x+1=sec^4x
This is for my trig class, thanks for the help!
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01/05/14

Verify: 1+cosx/sinx+sinx/1+cosx=2cscx
This is for my trig class, thanks for the help!
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01/05/14

Verify: cosusinv=1/2[sin(u+v)-sin(u-v)
This is for my trig class, thanks for the help!
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01/05/14

Use the double angle formulas to determine: A. cos120degrees and B. tan300degrees
This is for my trig class, thanks for the help!
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01/05/14

Write sin(sin^-1x-cos^-1x) as an algebraic expression in x.
This is for my trig class, thanks for the help!
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01/05/14

Verify tan(x+pi/4)= 1+tanx/1-tanx
This is for my trig class, thanks for the help!
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