Double &half angle

Name : May Da Period: 3rd Date : IL- 10- 21 Test/Quiz( Unit IV: Double & Half Angle) 1. The expression sin *is equivalent to cos x 1) 1 2 ) - 1 3) Cosx 4) sink 2. The expression - cos * is equivalent to sin x 1 ) 1 2 ) - 1 3) sin x 4) cosx 3. The expression sin A is equivalent to tan A IS 1) sin A 2) sin A Cos A 3) 4) COSA sin A COs A sin A cos A 4. The expression sinx - cos* is equivalent to tan x 3) cos x 4) cos x 1)1 2) sin x 5. If x is a positive acute angle and cosx = -, what is the value of cos - x? 4 ) -3 1 ) 3 2 ) 7 3 6. If cos @= , the positive value of sin ~ is 3 ) 76 4 ) 2 ) 4 4) 7. If sin A = =, what is the value of cos 2A? 3 ) _ 2 ) WIN 1 ) _ 2