Introduction to Trigonometry and Law of Sines

cosec 31°-sec59°=.....

• 1

• 2

• 0

• 1/2

3sin30°-4sin³30°=.....

• 1

• √2

• -1

• 0

(Sin30°+cos30°)-(sin60°+cos60°)=......

• 1

• 1/√2

• √3/2

• 0

In ∆ABC, B=90° .If AB=2cm & AC=3cm then sinA=........

• 1/2

• 2/√3

• √5/3

• 5/√3

If 2sinA-1=0,. then secA+tanA =........

• 3

• √3

• √2

• 0

If sinA =√3/2, then A=.....

• 45°

• 90°

• 60°

• 30°

cos(90°-A) =.....

• cosA

• sinA

• cosecA

• secA

If tanA =4/3, then cotA=.......

• 4/3

• 3/4

• 1/3

• 1/4

If tanA=cot(30°+A),then A=.....

• 60°

• 45°

• 30°

• 90°

In what kind of triangle can you use SOH-CAH-TOA?

• right triangle

• any kind of triangle

• any kind of triangle except a right triangle

• none of the above