PIease help me solve some of questions in steps . 1.Evaluate cos28°.cos32°-sin28°.sin32° 2.Sin^2(120°-A) + sin^2 A + sin ^2(120° + A) 3.cos(a+b)=4/5 and sin(a-b)=5/13 and A and B lies in range of 0°-45° ,find the value of tan2a ?
I am aiming to recover my basics. I have no reference book with me but just a question bank at the moment .So please help me solve some of these questions ?
PIease help me solve some of questions in steps . 1.Evaluate cos28°.cos32°-sin28°.sin32° 2.Sin^2(120°-A) + sin^2 A + sin ^2(120° + A) 3.cos(a+b)=4/5 and sin(a-b)=5/13 and A and B lies in range of 0°-45° ,find the value of tan2a ?
I am aiming to recover my basics. I have no reference book with me but just a question bank at the moment .So please help me solve some of these questions ?
Kushal Vedant Mahajan , 12 Years ago
Grade
