trig
posted by student
Let Q be an acute angle such that sinQ=.6. Find the values of the following using Trig Identities: cosQ and tanQ

rick
sin^1(.6) = 36.8 degrees
cos36.8 = .80
tan36.8 = .748 
Reiny
They probably wanted exact values without using a calculator.
given sinQ = .6 = 6/10 or 3/5
so Q is in a right angled triangle with opposite side of 3 and hypotenuse of 5.
You should recognize the famous 345 rightangled triangle.
then
cosQ = 4/5 or .8
tanQ = 3/4 or .75
these values are "exact" 
bobpursley
You can do it this way:
sin^2 + cos^2=1
.36+cos^2=1
solve for cosTheta.
Then finally, tanTheta= sinTheta/CosTheta 
student
your amazing.
Respond to this Question
Similar Questions

MATH PLEASE
can a reference angle be negative? Tye "reference angle" in google and check out the mathwords site :) no I copied and pasted the mathwords page for you, unfortunatly the diagram that was with it cant, express itself in text so it 
Calculus
complete the identity sinq / cosq + cosq / sinq = I'm not sure I'm coming up with 1 + cot q 
trig
Find cosq and sinq if the terminal side of q lies along the line y =  2 x in quadrant IV. 
Trig
How do you express sin4x as a trigonometric funcition of x using the identities? 
trig
Solving Trig Functions: How Do You Solve For Sin 7.5 Using HalfAngle and DoubleAngle Identities? 
Trig
find the exact values of the six trig functions of angle... sin(315degrees) how do i do this? 
trig
let P be a point in Q1 such that the slope of the line connecting P to the origin is sq. root of 2 and the distance from P to the origin is 3 units. Find the coordinates of P, state all trig values for angle formed by the line and … 
tRiG/ AlGeBrA
1) Use doubleangle identities to write the following expression, using trigonometric functions of x instead of 4x. cos 4x 2) Use halfangle identities to write the following expression, using trigonometric functions of x instead of … 
trig
1) Use doubleangle identities to write the following expression, using trigonometric functions of x instead of 4x. cos 4x 2) Use halfangle identities to write the following expression, using trigonometric functions of x instead of … 
Maths
In triangle PQR,angle p=90degree if PQ=√3 and QR=2,then find the value of sinQ ,cosQ,tanR,SINR