Friday
April 18, 2014

Homework Help: trig/math

Posted by Bob on Friday, November 11, 2011 at 11:32am.

If A is between 270degrees and 360degrees, and cos A=12/13, find the exact value of:

sin2a, cos2a, sin1/2a, cos1/2a

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

maths - Prove the following trigonometric identities (i)(1+cotx)^2 +(1-cotx)^2=...
trig - find, to the nearest degree, the solution set of 4 cos^2x-1=0 in the ...
Trig - Verify:cos(360degrees-x)=cos x
advanced functions(trig) - solve for x, to the nearest degree, in the interval ...
Check Math Answers - What are the values of the trigometric functions; The ...
trig - 5sin^2 270degrees -3cos180degrees-tan(-180degrees) i got -2 but I'm not ...
Trigonometry - 4. Find the exact value for sin(x+y) if sinx=-4/5 and cos y = 15/...
trig - how would you verify this trig identity (1+cos(x) / 1-cos(x)) - (1-cos(x...
Trig - Find all of the solutions between 0 and 2pi: 2sin(x)^2 = 2 + cos(x)
trig 26 - simplify to a constant or trig func. 1. sec Ču-tan Ču/cos Čv+sin Čv ...

Search
Members