Trigonometric Ratios CBSE NCERT Solutions Chapter 8 Exercise 8.2 Question 1
1. Evaluate the following:
(i) sin 60
cos 30
+ sin 30
cos 60
(ii)
(iii)
)
(iv) (
(v) (
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Trigonometric Ratios CBSE NCERT Solutions Chapter 8 Exercise 8.2 Question 1
1. Evaluate the following:
(i) sin 60
cos 30
+ sin 30
cos 60
(ii)
(iii)
)
(iv) (
(v) (
Values of Trigonometric ratios for 0, 30,45, 60 and 90 degrees
I have noticed that students cannot actually remember values of six trigonometric ratios (sin, cos, tan, cosec, sec and cot) for 0
, 30
, 45
, 60
and 90
. These values are used very often and it is recommended from my point of view that student should be able to tell the values instantly when asked.
Trigonometric Ratios CBSE NCERT Solutions Chapter 8 Exercise 8.1 Question 11
11. State whether the following are true or false. Justify your answer.
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Trigonometric Ratios CBSE NCERT Solutions Chapter 8 Exercise 8.1 Question 10
10. In
, right angled at Q, PR + QR = 25 cm And PQ = 5 cm. Determine the values of sin P, cos P and tan P.
Trigonometric Ratios CBSE NCERT Solutions Chapter 8 Exercise 8.1 Question 9
9. In
, right angled at B, if tan A =
, find the value of
(i) sin A cos C + cos A sin C
(ii) cos A cos C – sin A sin C