6. sin150 Sin(90+60)=+cos60∘=+1/2 sin(180−30)=+sin30∘+1/2 7cos120∘cos(90..
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6. sin150 Sin(90+60)=+cos60∘=+1/2 sin(180−30)=+sin30∘+1/2
7cos120∘cos(90+30)=−sin30∘=+1/2cos(180∘−60)=−cos60∘=−1/2
cos(90+60)=−sin60∘=−8/2cos(180∘−30)=−cos30=−3/2
cos150
Video solution 1: 6. sin150 Sin(90+60)=+cos60∘=+1/2 sin(180−30)=+sin30∘+1/2 7cos120∘cos(90+30)=−sin30∘=+1/2cos(180∘−60)=−cos60∘=−1/2 cos(90+60)=−sin60∘=−8/2cos(180∘−30)=−cos30=−3/2 cos150
Video solution 2: 6. sin150 Sin(90+60)=+cos60∘=+1/2 sin(180−30)=+sin30∘+1/2 7cos120∘cos(90+30)=−sin30∘=+1/2cos(180∘−60)=−cos60∘=−1/2 cos(90+60)=−sin60∘=−8/2cos(180∘−30)=−cos30=−3/2 cos150
Video solution 1: 6. sin150 Sin(90+60)=+cos60∘=+1/2 sin(180−30)=+sin30∘+1/2 7cos120∘cos(90+30)=−sin30∘=+1/2cos(180∘−60)=−cos60∘=−1/2 cos(90+60)=−sin60∘=−8/2cos(180∘−30)=−cos30=−3/2 cos150
Video solution 2: 6. sin150 Sin(90+60)=+cos60∘=+1/2 sin(180−30)=+sin30∘+1/2 7cos120∘cos(90+30)=−sin30∘=+1/2cos(180∘−60)=−cos60∘=−1/2 cos(90+60)=−sin60∘=−8/2cos(180∘−30)=−cos30=−3/2 cos150
sin theta ) ( . . ) iv) ( cos ^ { 2 } 45 ^ { circ } - cot 30 ^ { circ } + )
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cos^(-1) sin (-60^(@))`
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