0

Guest

Courses New

sin theta + sin phi = a cos theta + cos phi = b theta- phi = alpha eliminate theta and phi

sin theta  + sin phi = a
cos theta + cos phi = b
theta- phi = alpha
eliminate theta and phi

Grade:11

1 Answers

mohan
33 Points
6 years ago
sin(theta) +sin(phi)=a implies 2sin((theta +phi)/2)cos((theta-phi)/2)=a “equation1” similarly 2cos((theta+phi)/2)cos((theta-phi)/2)=b “equation 2” on dividing both equations we have tan((theta+phi)/2)=a/b implies sin((theta+phi)/2)=a/(a2+b2)1/2 substituting in equation  one we have cos(alpha/2)=(a2+b2)1/2/2

Think You Can Provide A Better Answer ?

Other Related Questions on Trigonometry

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