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Grade 10Trigonometry

Question no. 14. Of this image....please give the answer as soon as possible

Question image for Question no. 14. Of this image....please give the
Profile image of Tisha Dubey
9 Years agoGrade 10
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1 Answer

Profile image of Arun
9 Years ago
as sec\theta = cos2\theta
thus 1/cos\theta = cos2\theta
cos3\theta= 1
cos\theta=1
hence sin\theta=0 for all \theta
hence sin4\theta+2sin3\theta+sin2\theta = 0+0+0
= 0
 answer will be 0

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