LECTURE#75 EXERCISE 7.5 PART#1 EXAMPLES &PROOF OF TRIGONOMETRIC IDENTITIES UNIT 7 MATH 10 KPK BOARD

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unit 7 introduction to trigonometry, in this video we proved trigonometric identities
cos²θ+sin²θ=1
1+tan²θ=sec²θ
1+cot²θ=cosec²θ
examples 16 to 19
LECTURE#75 EXERCISE 7.5 PART#1 EXAMPLES &PROOF OF TRIGONOMETRIC IDENTITIES UNIT 7 MATH 10 KPK BOARDS
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