Trigonometry Answers

Frank and Marie set sail from the same point. Frank is sailing in the direction S5 °E. Marie is sailing in the direction S9°W. After 3 hours, Marie was 2 miles due west of Frank. How far had Marie sailed? Round to 4 decimal places.

if theta=sin^-1(x)+cos^-1(x)-tan^-1(x) and x>0 or x=0 then
optins-1)45<theta<90
2)0<theta<180

The bearing of bird on a tree from a hunter on the ground is N720E. What is the bearing of the hunter from the bird?

find the value of common radius which is 4 of the ball bearings

When you're solving a trig equation and it asks you to solve each equation for all values of x, do you have to give the answer in "for any integer n" form?

There is a tower the angle of elevation from the point 'A' which is situated South of the tower is 30°. And angle of elevation of the tower from point 'B' which is to the West of point 'A' is 18°.
If AB = a
Find the height of tower using 'a'.
(sin 18°= (√5-1)/4 )

Express the complex number in trigonometric form.

-3 + 3 square root of threei

IN ANY TRIANGLE ABC, IF SIN^2A = SIN^2B + SIN^2C ; PROVE THAT THE TRIANGLE IS RIGHT ANGLED AT A

Find the value of:-
sin4A-cos4A=sin2A-cos2A

if tana=b/a, prove that acos2a+bsin2a=a