evaluate sin23° cos67° + cos23° sin67°
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sin 23° cos 67° + cos 23° sin67°
=sin23° cos(90°-23°) + cos 23° sin(90°-23°)
=sin23° sin23°+cos23° cos23°
=sin^2 23°+cos^2 23°
=1
=sin23° cos(90°-23°) + cos 23° sin(90°-23°)
=sin23° sin23°+cos23° cos23°
=sin^2 23°+cos^2 23°
=1
manimahesh999:
how did you get atlast 1as ans
As sin^2 A + cos^2 A = 1
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