sss importent questions

TRIGNOMETRY
Note: Here α means the angle theta

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The radius of a circle is 14 cms .The angle subtended by an arc of the circle at the centre is 45o.Finf the length of the arc.

Sin (A-B) = ½ Cos (A+B) = ½ Find A and B

Exercise -3: Short answer type ;--- 3,9,10,12,15 Essay type question: 3,4,9,10,12,14,15

Sin α = 15/17 evaluate 15Cot α + 17 Sin α/ 8 Tan α + 16 Sec α (α = theta)

Express all trigonometric ratios in terms of Sec α

Exercise 4: short answer type 3,8,12,19,20 Essay type questions ; 1,3(most important exercise better to practice all here)

Eliminate α
a. x = aSec α y = bTan α

b. x = Cos α + Sin α y = Cos α- Sin α

c. xCos α + ySin α = a xSin α - yCos α = b
8. A rhombus of side 10cms has two angle seach of 60o .Calculate the length of the diagonals

9. Examples (3 and 5 ) before Exercise -7

10. Exercise -7; Short answer type : 3,6,9,10
Essay type questions : 4,5,7,10

Pratice Exercise -7 problems using the angles 21o 421 and 42o 18 1