Ask a New Question

Question

Half Angle Identities

cosx = 7/25
greater than 270 deg and less than 360
Determine cos 1/2x
a. -7rt2/10
b. 7rt2/5
c.7/25
d.-4/5
I get 7rt2/5 Is this correct??
13 years ago

Answers

Don
Oops, brain fart ... answer is -4/5 i guess it was a long day ...
thanks anyway ..
Don
13 years ago

Related Questions

1) use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the... Use the double angle identities to find sin2x if sinx= 1/square of 17 and cosx<0 . Give exact answ... Half angle identities Find exact values of a) cos 1/2 b) sin 1/2 c) tan 1/2 based on: cos = 1... 1) Use double-angle identities to write the following expression, using trigonometric functions of x... use an appropriate half-angle formula to find the exact value ofthe expression. tan22.5 write th... Use the half-angle identities to find all solutions on the interval [0,2pi) for the equation cos^... verify the identities COSX OVER 1PLUS SINX PLUS 1PLUS SINX OVER COSX IS EQUAL TO 2SEC. Use half angle identities to find exact value. Given tan theta = -sqrt 2 / 2 and theta lies in qua... How do you use the half angle formulas to determine the exact values of sine, cosine, and tangent of... An angle is 30 less than half its complement. Find the angle.
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use