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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
show that: 1-sin 60/cos 60 = 1-tan 60 / 1+ tan 60 - Maths - Introduction to Trigonometry - 5078491
Page 31 - modul trigonometri_Neat
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Evaluate: sin 60° cos30° + sin 30° cos 60°
sin theta ) ( . . ) iv) ( cos ^ { 2 } 45 ^ { circ } - cot 30 ^ { circ } + )
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Evaluate the followingi sin 60∘cos 30∘+sin 30∘cos 60∘ii 2 tan 2 45∘+cos 2 30∘ sin 2 60∘iii cos 45∘/ 30∘+cosec 30∘iv sin 30∘+tan 45∘ cosec 60∘/ 30∘+cos 60∘+ 45∘v 5 cos 2 60∘+4 2 30∘ tan 2 45∘/sin 2 30∘+cos 2 30∘
What is the value of sin150? - Quora