trignometry

1. Prove the equation

sin2x+cos2x=1
2. Trignometry 11 Questions

Hi, I have two questions that I am stuck on. I have tried but am stuck. Any help is greatly appreciated! 1. A plane takes off at a 15 deg angle and flies at an average speed of 660 km/h. How high will it be two minutes after its wheels have left the earth? Round your answer to the nearest tenth...
3. trignometry

A boat sets off on a trip from S.it heads towards B,a point 6km away and due north.At B it changes direction and heads towards point C,also 6km away and due east of B.At C it changes the direction again and heads on a bearing of 135towards Dwhich is 13km from C. a) Calculate the distance...
4. Parabola Trignometry

Hi, could someone please help me with part (a) of this question. I understand everything except that part... Thanks heaps.
5. Trignometry - modelling and problem solving

From a point A due north of a tower, the angle of elevation to the top of the tower is 45 degrees. From point B, 100M on a bearing of 120 DEGREES FROM A the angle of elevation is 26 degrees. Find the height of the tower. Please can you help with this problem
6. trignometry question

Can someone please help me with this question.. I attempted it and got the correct ans for the first 3 parts but for the last part my ans was wrong, and I couldn't figure out why One end of a piece of elastic is attatched to a point at the top of a door frame and the other end hangs freely. A...
7. Matrices related to trignometry and vectors

Hey guys! I am stack at this problem and not sure how I have to proceed, in the first part, when it says find the matrix for that rotation , does it mean from Q to P? do I find that by writing a trigonometric function of that and put it in an augmented matrix form? B part...no clue.., C) is ok...
8. need help "stretching" a line and ending on a specific angle against axis

Here's a problem I assumed would be easy, but it has melted my brain for a long time and I am not really sure anymore. So I am using cos and sin to draw round curves in a program (it's okay that it's slow). You specify an x length, y length, and angle1 and angle2 with the axises you want the...
9. how to solve the following using Euler identity .

show that exp (i (x + y)) = exp (ix) exp (iy)
10. A problem involving Inverse trignometry.

Solve the equation: Tan-1 [(x-1)/(x-2)] + Tan-1 [(x+1)/(x+2)] = π/4
11. Trignometry help with compass directions.

A pilgrim travelling along a road, which at this point runs due North and is straight, observes a sign by the wayside warning travellers to the North that the den of Ali Baa Baa and his 40 thieves is located at a bearing of 49o T at a distance of 8km. Ali's gang uses a herd of camels in their...
12. 3D Trignometry problem - how to calculate the Horizontal distance?

Refer to the (very ordinary) 3d diagram below. Formulae required to determine HD. Slope Distance (SD), angles and dH are measureable. A 3d soulition is required with no approximations, if possible.
13. equality proof

anybody knows how to solve this ? im reviewing for my test,any help is highly appreciated
14. Simpler way to graph multiple trig. functions?

hey everybody, hope you enjoying maths :) so in class we are graphing functions like this: y = 3cos2x + 2sin3x + 1 and we are supposed to draw 3cos2x and 2sin3x + 1 separately than add their y-values at certain x-values to get the first function. This is sometimes painstaking and very...
15. SOLVED Another simple trig identity

This looks simple of paper but for the life of me I can't seem to figure it out (Headbang) LS=cos(x-y)cosy-sin(x-y)siny RS= cosx Greatly appreciated!
16. SOLVED Solving a trig identity

LS=(tanx-tany)/(cotx-coty) LS=-tanxtany If possible try to avoid use of the tan compound formula. Thanks!
17. trignometry confusion

1]the equation1-\cos^ x + \sinx\cosx = k then there exists real solution when k belongs to A)0<k<\frac{1+\sqrt2}{2} B)2-\sqrt3 < k 2+\sqrt3 C)0<k<2-\sqrt3 D)\frac{1-\sqrt2}{2} < k < \frac{1+\sqrt2}{2} 2]let a,b belong to the set [0,\frac{\pi}{2}] if sin^6 a+3\sin^2 a\cos^2 a+\cos^6 b=1 then...
18. Problem with functions and Trignometry

Hey all, I'am a university student doing first year differential calculas and unfortunately for me, I don't have a very developed base in some portions of this course. I'am currently doing chapter 1 & 2 and I'am having some problems with functions and Trignometry. Trignometric problem...
19. trignometry

solve the eqn: 1/log(base 4) (x+1)/(x+2) < 1/log(base 4) (x+3) regret me the topic is LOGARITHMS