Trigonometry
posted by Jennifer
Use the trig Identities to find the other 5 trig functions.
Problem
7.)Tan(90x)=3/8
8.)Csc x=13/5
9.)Cot x=square root of 3
10.)Sin(90x)=.4563
11.)Sec(x)=4
12.)Cos x=.2351
I need HELP!

Reiny
I will do one for you.
You try some of the others and let me know what you got.
#8
csc x = 13/5, then
sin x = 5/13
so by CAST, angle x is in either III or IV
construct a rightangled triangle with the side opposite angle x as 5 and hypotenuse 13 (sin ß = opp/hyp)
By Pythagoras the adjacent side is 12
so in III, (x is appr. 202.62º)
sin x = 5/13
cos x = 12/13
sec x = 13/12
tan x = 5/12
cot x = 12/5
in IV, (x is appr. 337.38º)
sin x = 5/13
cos x = 12/13
sec x = 13/12
tan x = 5/12
cot x = 12/5 
Jennifer
Would #7 be Sin 3 over square root of 73 Cos 8 over square root of 73 Tan 8/3 Csc square root of 73 over 3 Cot 3/8

basker
sin x =4/5 and cos y = 5/3
sin x = 4/5
cos x = 3/5
soc^2 x = 5/3 answer
Respond to this Question
Similar Questions

more trig.... how fun!!!!
if you can't help me with my first question hopw you can help me with this one. sec(x)/csc(x)=tan(x) thanx to anyone who can help From the definition of the sec and csc functions, and the tan function, sec(x)/csc(x) = sin(x)/cos(x) … 
Math
There are no typos and no work b/c I don't know how to do them. Thanks. 1)Find cos theta if sin theta=3/5 and 90 degrees<theta<180 degrees. A)4/5 B)4/5 C)square root of 34/5 D)square root of 34/5 I chose A 2)Simplify:1csc^2theta/cot^2theta … 
math
There are no typos and no work b/c I don't know how to do them. Thanks. 1)Find cos theta if sin theta=3/5 and 90 degrees<theta<180 degrees. A)4/5 B)4/5 C)square root of 34/5 D)square root of 34/5 I chose A 2)Simplify:1csc^2theta/cot^2theta … 
Trigonometry
Hello all, In our math class, we are practicing the trigonometric identities (i.e., sin^2(x)+cos^2(x)=1 or cot(x)=cos(x)/sin(x). Now, we are working on proofs that two sides of an equation are equal (for example, sin(x)*csc(x)=1; sin(x)csc(x)=sin(x)/sin(x)=1; … 
Trig
Find the exact values of the six trigonometric functions 0 if the terminal side of 0 in standard position contains the points(5,4). (0 is not the number zero I don't know what its called) I have to find r first. r=sqrt x^2+y^2 r=sqrt … 
trig
I do not understand these problems. :S I'd really appreciate the help. Use trigonometric identities to transform the left side of the equation into the right side. cot O sin O = cos O sin^2 O  cos^2O = 2sin^2 O 1 (tan O + cot O)/tan … 
Math  Trig
I'm trying to verify these trigonometric identities. 1. 1 / [sec(x) * tan(x)] = csc(x)  sin(x) 2. csc(x)  sin(x) = cos(x) * cot(x) 3. 1/tan(x) + 1/cot(x) = tan(x) + cot(x) 4. csc(x)/sec(x) = cot(x) 
trigonometry repost
Reduce (csc^2 x  sec^2 X) to an expression containing only tan x. (is this correct? 
calculus
need help simplifying some trig identities such as: (csc t) (sin t) cos t = 0.75 and tan t = 0.88, find sec t and cot t; (cot2t) (sin2t) + sin2 t; csc2t  cot2t/sin2t 
Trig.
Hey I am doing test corrections and need help, Which of the following inverse functions are defined for x=1/2 ?