find the value of sin 90°, cos90° and tan90° geometrically. #dreamzruntowin #trigonometryclass10th

find the value of sin 90°, cos90° and tan90° geometrically.
#dreamzruntowin
#trigonometryclass10th

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1.Trigonometry introduction

2. To find six trigonometric ratios when two sides ate given
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3. To find other trigometric ratios when one ratio is given

4. Ncert eg 1. Given tanA=4/3, Find the other trigonometric ratios

5. Ncert eg. 2. If ∠B and ∠are acute angles such that sin B= sin Q, then find then prove that ∠B=∠Q.

6. Ncert eg3. Consider ∆ACB right angled at C in which AB=29units BC=21 units and ∠ABC=θ, Determine the value of
i) cos²θ+sin²θ
ii) cos²θ- sin²θ

7. In a right triangle ABC right angle at B if tanA=1then verify that
2sinA cosA=1

8. In a ∆OPQ right angled at P , O P =7cm and OQ- PQ =1cm . Determine the values of sinQ and cosQ.

[gamingminimilta]

ANSWERS
1- 1/4
2- 10
3- 8√3
4- 5
5- 23√3+1/4√3
6- 49/4

[ashagoswami]

Answer
1. 1/4
2. 10
3.8√3
4.5
5.23√3+1/4√3
6. 49/4

[ArjunSingh]

Answers
1- 1/4
2- 10
3- 8√3
4- 5
5- 23√3+1/4√3
6- 49/4
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