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If cos x = -1/3 and π < x < 3π/2.find sin x/2,cos x/2,tanx/2. |
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Answer» Step-by-step explanation: answr search What would you like to ask? 11th Maths Trigonometric Functions Trigonometric Equations If PI/2 < X < pi , then √(1... MATHS If 2 π
1+sinx 1−sinx + 1−sinx 1+sinx is equal to MEDIUM Share Study later ANSWER Given 2 π 1+sinx 1−sinx + 1−sinx 1+sinx = 1+sinx 1−sinx + 1−sinx 1+sinx = ( 1+sinx )( 1−sinx ) ( 1−sinx ) 2 +( 1+sinx ) 2 = 1−sin 2 x 1−sinx+1+sinx = cos 2 x 2 = ∣cosx∣ 2 As x∈( 2 π ,π),∣cosx∣=−cosx So 1+sinx 1−sinx + 1−sinx 1+sinx = −cosx 2 =−2secx |
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