Скачать или смотреть Exercise 11.1, Problem-9,

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10th Standard.
Chapter name: Introduction to Trigonometry.

NCERT : Exercise 11.1 , Problem-9
CBSE : Exercise 8.1 , Problem-9


9. In triangle ABC, right angled at B, if tan⁡𝐴=1/√3, find the value of :
1. sin A cos C + cos A sin C
2. cos A cos C – sin A sin C
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0:00 - Introduction
0:19 - Problem statement
0:55 - Understanding the problem statement
1:10 - Find the lenght of AB and BC
2:22 - Apply pythagoras theorem to find the length of AC
3:25 - Find sin A
4:07 - Find sin C
4:41 - Find cos A
5:10 - Find cos C
5:45 - Find the required values for 1 and 2.