isc class 11 maths | trigonometry | chapter 3 | ML aggarwal Ex 3.5 solution Q 4 - 21 |

Опубликовано: 16 Февраль 2026
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isc class 11 maths trigonometry chapter 3 ML Aggarwal Exercise 3.5 Solution Que no 4 - 21

Dear student,

We are releasing lecture 3.5 Part 2 covering ml aggarwal 3.5 concepts of trigonometric functions of sum and difference of two angle and trigonometric functions of allied angle with solution Q 4 to 21.
The proof of trigonometric functions of sum and difference of two angle i.e prrof of sin(x + y) = sinx cosy + cosx siny is also been explained in previous lecture L-3.5 p-1.
with the similar way you can do the proof of other trigonometric function for sum and difference of two angle.

Hope it will be beneficial for you.

Thanks

Dr. Ajay Kumar Gupta

sin(x + y) = sinx cosy + cosx siny
sin(x - y) = sinx cosy - cosx siny
cos(x + y) = cosx cosy - sinx siny
cos(x - y) = cosx cosy + sinx siny

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Thanks
Dr. Ajay Gupta

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