Trigonometry p3

If: cos 2X = 0.5, X is the measure of an acute angle, then m(< X ) = ........

• 15

• 30

• 45

• 60

In ∆ ABC if m(<B)= 90 , then Sin A + cos C = .......

• 2 Sin A

• 2 Sin C

• 2 Sin B

• 2 Cos A

2 Sin 30 Cos 30 = .....

• Sin 60

• Cos 60

• Tan 60

• 2 Sin 60

In ∆ ABC , IF m(<B) = 90⁰ ,AB= 3 cm, BC = 4 cm , then Sin A Cos C = .....

• 1

• ⁹/₂₅

• ¹²/₂₅

• ¹⁶/₂₅

If, Sin X = 0.5 , X is an acute angle, then

Sin 2X = ......

• 1

• ¹/₄

• ^√3/₂

• ¹/_√3

If, Sin 30 = Cos X, where X is an acute angle, then m(<X) = .....

• 10

• 30

• 45

• 60

Sin 60 + Cos 30 + Tan 60 = ......

• -√3

• 3√3

• √3

• 2√3

If ∆ XYZ IS right angled triangle at Z ,

XY = 25cm, YZ =7 cm then Sin X+ Sin Y = .....

• ³¹/₂₅

• ¹⁷/₂₅

• 2

• 1

If 2 Sin x = 1 , then m(<X) = ......

• 60

• 45

• 30

• 15

If Sin X = 2 Cos 60 Sin 30 , where X is an acute angle, then m (<X) = ......

• 15

• 30

• 45

• 60