0

Guest

Courses New

Cos 2 76deg + Cos 2 14deg -cos76deg.cos16deg.=

Cos276deg + Cos214deg -cos76deg.cos16deg.=

Grade:11

1 Answers

Rinkoo Gupta
askIITians Faculty 81 Points
9 years ago
cos276+cos214-cos76cos16
(1+cos152)/2+(1+cos28)/2-cos76cos16
=1+1/2[cos(180-28)+cos28]-cos76cos16
=1+1/2[-cos28+cos28]-cos76cos16
=1-cos76cos16
=1-1/2[2cos76cos16]
=1-1/2[cos92+cos60]
=1-1/2[cos(90+20+1/2]
=1-1/2[-sin2+1/2]
=1-1/4+1/2 sin2
=3/4+(1/2) sin2
Thanks & Regards
Rinkoo Gupta
AskIITians Faculty

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