0

Guest

Courses New

could you give some points about trig. I am always confused with trig about how to calculate cos46, tan32, sin54 withot a calculator..... could you pls clear this doubt

could you give some points about trig. I am always confused with trig about how to calculate cos46, tan32, sin54 withot a calculator..... could you pls clear this doubt

Grade:8

1 Answers

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
8 years ago
Hello Student,
Try relating them with common values
sin0,30,45,60,90
for eg for sin15 use sin30 value
for sin54 we do like this
90-2*18=3*18
so
sin2*18=sin3*18
using sin2A and sin3A we can find sin18
then again we get sin3*18 by sin3A
similary cos36=sin54
Thanks & Regards
Arun Kumar
Btech, IIT Delhi
Askiitians Faculty

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

Other Related Questions on Discuss with Askiitians Tutors

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More