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Sol, sin θ + cos θ = V2sin (9in θJ2 cos θ-cos θ-2V2+1cot θWithout using trigonometric tabl1. Sin 16°cos 74tan 38cot 52°2. () sin 67° +sin2 23°(iii)(iv)cos(i) Sin 490)2 |
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Answer» sin16/cos74=sin(90-74)/cos74=cos74/cos74=1tan38/cot52=tan(90-52)/cot52=cot52/cot52=1sin^2(67)+sin^2(23)=sin^2(90-23)+sin^2(23)=sin^2(23)+cos^2(23)=1 |
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