Lesson#5 [ Question No. 4 ]

Name: Lesson#5 [ Question No. 4 ]
Uploaded: 2015-10-01T13:29:24+00:00
Duration: 14 min 4 s
Channel: Punjab Group of Colleges
Description: Lesson#5 Question No. 4 Q4: Prove that: (i) cos 20°+cos⁡100°+cos⁡140°=0 (ii): sin⁡(π/4−θ) sin⁡(π/4+θ)=1/2 cos2θ Math.Ex.10.4, Part05-10.4 (iii): (sinθ+sin3θ+sin5θ+sin7θ)/(cosθ+cos3θ+cos5θ+cos7θ)=0 Trigonometric Identities Chapter No 10 Exercise No 10.4 Mathematics part 1

Punjab Group of Colleges

Lesson#5   Question No. 4   Q4:   Prove that:  (i)     cos 20°+cos⁡100°+cos⁡140°=0  (ii):   sin⁡(π/4−θ)  sin⁡(π/4+θ)=1/2 cos2θ  Math.Ex.10.4, Part05-10.4  (iii):  (sinθ+sin3θ+sin5θ+sin7θ)/(cosθ+cos3θ+cos5θ+cos7θ)=0  Trigonometric Identities  Chapter No 10  Exercise No 10.4  Mathematics   part 1

Category

Recommended