25 lessons,

4h 49m

Enroll

1.6k

✕Download

## Vineet Loomba is teaching live on Unacademy Plus

Vineet Loomba

IITian | No. 1 Educator in IIT-JEE | 6 Million Minutes Watch Time | 8+ Years Experience | Youtube: Maths Wallah | vineetloomba.com

Comments

(15)

U

Unacademy user

MP

MONIKA PANDEY

2 years ago

keep sharing

0

Reply

Sachin Verma

21 days ago

sir min and max values and trigonometry series in ap gp par ek video bana digiye

0

Reply

Divya Soni

4 months ago

Sir, in the second example, where A + B + C = 3pi/2, shouldn't it be 1+ 4sinAsinBsinC? Inside the 3 cos terms, the sum of the angles is 3pi, which is the same as pi? So that makes it similar to the identity of cosA + cosB + cosC where A+B+C = pi? Using that logic (please correct me if I am wrong), answer should be 1 + 4sinAsinBsinC?

0

Reply

Vineet Loomba

4 months ago

no you are wrong ... we have to proceed mathematically here and not logically ..we cannot make new formulas ....see the derivations then u might understand

Divya Soni

4 months ago

Oh. Okay sir. Thank you.

Spartan

9 months ago

sir mazaa aa gya.... sabse sahi video series hai trigo pe ...

1

Reply

Vineet Loomba

9 months ago

Thanks a lot ..pls dont forget leave a 5 star review and watch all other 29 courses on my profile

SS

Sai Sri Harsha

a year ago

sir, I am preparing only for objective. I am a dropper. If I can remember these identities, do I need to learn the proof also?

2

Reply

Spartan

9 months ago

nope bro just learn these...

Vikas Negi

a year ago

sir in the last example we have to prove that tan2a+tan2b+tan2c=tana.tanb.tanc. than without any given statement how can you say a+b+c is a multiple of π

1

Reply

Vineet Loomba

a year ago

bcz tan A + Tan b + tan C = tanA tanB TanC

View More