What is the value of (cos2 67°-sin2 23°)?
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cos^2 67° - sin^2 23° = sin^2 (90°-67°) - sin^2 23°
= sin^2 23° - sin^2 23° = 0
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= sin^2 23° - sin^2 23° = 0
Hope this will help you!!!
☺☺ Keep smiling ☺☺
Answered by
2
cos sq. 67° - sin sq. 23°
= cos sq. 67° - sin sq. ( 90° - 67° )
= cos sq. 67°- cos sq. 67°
= 0
= cos sq. 67° - sin sq. ( 90° - 67° )
= cos sq. 67°- cos sq. 67°
= 0
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